/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Addition03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:31:29,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:31:29,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:31:29,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-21 20:31:29,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:31:29,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:31:29,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:31:29,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:31:29,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:31:29,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:31:29,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:31:29,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:31:29,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:31:29,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:31:29,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:31:29,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:31:29,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 20:31:29,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:31:29,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:31:29,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:31:29,556 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 [2020-08-21 20:31:29,577 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:31:29,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:31:29,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:31:29,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:31:29,579 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:31:29,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:31:29,579 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:31:29,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:31:29,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:31:29,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:31:29,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:31:29,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:31:29,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:31:29,580 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:31:29,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:31:29,581 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:31:29,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:31:29,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:31:29,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:31:29,582 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:31:29,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:31:29,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:31:29,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:31:29,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:31:29,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:31:29,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:31:29,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:31:29,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:31:29,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:31:29,584 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=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:31:29,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:31:29,926 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:31:29,931 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:31:29,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:31:29,935 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:31:29,936 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition03-1.c [2020-08-21 20:31:29,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2742c1579/1a7c245de2fd4935962cff35d590b863/FLAG0d842c627 [2020-08-21 20:31:30,461 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:31:30,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Addition03-1.c [2020-08-21 20:31:30,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2742c1579/1a7c245de2fd4935962cff35d590b863/FLAG0d842c627 [2020-08-21 20:31:30,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2742c1579/1a7c245de2fd4935962cff35d590b863 [2020-08-21 20:31:30,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:31:30,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:31:30,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:31:30,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:31:30,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:31:30,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:31:30" (1/1) ... [2020-08-21 20:31:30,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532b1c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:31:30, skipping insertion in model container [2020-08-21 20:31:30,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:31:30" (1/1) ... [2020-08-21 20:31:30,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:31:30,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:31:31,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:31:31,098 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:31:31,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:31:31,124 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:31:31,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:31:31 WrapperNode [2020-08-21 20:31:31,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:31:31,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:31:31,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:31:31,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:31:31,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:31:31" (1/1) ... [2020-08-21 20:31:31,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:31:31" (1/1) ... [2020-08-21 20:31:31,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:31:31" (1/1) ... [2020-08-21 20:31:31,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:31:31" (1/1) ... [2020-08-21 20:31:31,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:31:31" (1/1) ... [2020-08-21 20:31:31,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:31:31" (1/1) ... [2020-08-21 20:31:31,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:31:31" (1/1) ... [2020-08-21 20:31:31,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:31:31,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:31:31,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:31:31,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:31:31,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:31:31" (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 [2020-08-21 20:31:31,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:31:31,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:31:31,309 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-08-21 20:31:31,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:31:31,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:31:31,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:31:31,309 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-08-21 20:31:31,309 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:31:31,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:31:31,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:31:31,534 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:31:31,535 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 20:31:31,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:31:31 BoogieIcfgContainer [2020-08-21 20:31:31,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:31:31,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:31:31,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:31:31,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:31:31,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:31:30" (1/3) ... [2020-08-21 20:31:31,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ae1f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:31:31, skipping insertion in model container [2020-08-21 20:31:31,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:31:31" (2/3) ... [2020-08-21 20:31:31,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ae1f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:31:31, skipping insertion in model container [2020-08-21 20:31:31,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:31:31" (3/3) ... [2020-08-21 20:31:31,548 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition03-1.c [2020-08-21 20:31:31,559 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:31:31,567 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:31:31,589 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:31:31,621 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:31:31,621 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:31:31,621 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:31:31,621 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:31:31,621 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:31:31,622 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:31:31,622 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:31:31,622 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:31:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-21 20:31:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 20:31:31,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:31,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:31,667 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:31,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1540493149, now seen corresponding path program 1 times [2020-08-21 20:31:31,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:31,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638661460] [2020-08-21 20:31:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:31,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:31,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:31:31,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638661460] [2020-08-21 20:31:31,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:31:31,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:31:31,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037928187] [2020-08-21 20:31:31,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:31:31,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:31,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:31:31,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:31:31,947 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-08-21 20:31:32,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:32,077 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-08-21 20:31:32,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:31:32,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 20:31:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:32,089 INFO L225 Difference]: With dead ends: 36 [2020-08-21 20:31:32,090 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 20:31:32,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:31:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 20:31:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-21 20:31:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 20:31:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-08-21 20:31:32,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2020-08-21 20:31:32,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:32,146 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-08-21 20:31:32,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:31:32,147 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-08-21 20:31:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 20:31:32,149 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:32,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:32,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:31:32,150 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:32,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:32,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1700112874, now seen corresponding path program 1 times [2020-08-21 20:31:32,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:32,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468526862] [2020-08-21 20:31:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:31:32,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468526862] [2020-08-21 20:31:32,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:31:32,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 20:31:32,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167715592] [2020-08-21 20:31:32,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 20:31:32,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:32,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 20:31:32,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 20:31:32,219 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 4 states. [2020-08-21 20:31:32,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:32,252 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-08-21 20:31:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 20:31:32,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-08-21 20:31:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:32,255 INFO L225 Difference]: With dead ends: 32 [2020-08-21 20:31:32,255 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 20:31:32,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 20:31:32,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 20:31:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-08-21 20:31:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 20:31:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-08-21 20:31:32,266 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-08-21 20:31:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:32,266 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-08-21 20:31:32,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 20:31:32,267 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-08-21 20:31:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 20:31:32,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:32,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:32,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:31:32,269 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:32,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:32,270 INFO L82 PathProgramCache]: Analyzing trace with hash -35294164, now seen corresponding path program 1 times [2020-08-21 20:31:32,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:32,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000658088] [2020-08-21 20:31:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 20:31:32,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000658088] [2020-08-21 20:31:32,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:32,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 20:31:32,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537538314] [2020-08-21 20:31:32,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:31:32,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:32,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:31:32,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:31:32,452 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-08-21 20:31:32,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:32,546 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-08-21 20:31:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 20:31:32,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-21 20:31:32,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:32,548 INFO L225 Difference]: With dead ends: 29 [2020-08-21 20:31:32,548 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 20:31:32,549 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 [2020-08-21 20:31:32,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 20:31:32,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-21 20:31:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 20:31:32,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-08-21 20:31:32,558 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 20 [2020-08-21 20:31:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:32,558 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-08-21 20:31:32,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:31:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-08-21 20:31:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 20:31:32,560 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:32,560 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:32,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:31:32,560 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:32,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:32,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1261456781, now seen corresponding path program 2 times [2020-08-21 20:31:32,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:32,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682425233] [2020-08-21 20:31:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-21 20:31:32,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682425233] [2020-08-21 20:31:32,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:32,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 20:31:32,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941627368] [2020-08-21 20:31:32,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 20:31:32,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:32,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 20:31:32,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 20:31:32,699 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 7 states. [2020-08-21 20:31:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:32,861 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-08-21 20:31:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 20:31:32,861 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-21 20:31:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:32,864 INFO L225 Difference]: With dead ends: 43 [2020-08-21 20:31:32,864 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 20:31:32,865 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 [2020-08-21 20:31:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 20:31:32,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 20:31:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 20:31:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-08-21 20:31:32,876 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 27 [2020-08-21 20:31:32,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:32,877 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-08-21 20:31:32,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 20:31:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-08-21 20:31:32,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 20:31:32,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:32,879 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:32,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:31:32,880 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2131329174, now seen corresponding path program 3 times [2020-08-21 20:31:32,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:32,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52305831] [2020-08-21 20:31:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:32,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 20:31:33,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52305831] [2020-08-21 20:31:33,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:33,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 20:31:33,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505114991] [2020-08-21 20:31:33,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 20:31:33,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 20:31:33,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 20:31:33,158 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 8 states. [2020-08-21 20:31:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:33,328 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-08-21 20:31:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 20:31:33,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-08-21 20:31:33,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:33,331 INFO L225 Difference]: With dead ends: 46 [2020-08-21 20:31:33,332 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 20:31:33,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:31:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 20:31:33,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 20:31:33,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 20:31:33,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 56 transitions. [2020-08-21 20:31:33,357 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 56 transitions. Word has length 34 [2020-08-21 20:31:33,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:33,358 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 56 transitions. [2020-08-21 20:31:33,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 20:31:33,358 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 56 transitions. [2020-08-21 20:31:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 20:31:33,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:33,365 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:33,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:31:33,366 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:33,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:33,366 INFO L82 PathProgramCache]: Analyzing trace with hash -867295607, now seen corresponding path program 4 times [2020-08-21 20:31:33,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:33,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896069834] [2020-08-21 20:31:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-21 20:31:33,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896069834] [2020-08-21 20:31:33,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:33,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 20:31:33,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147359508] [2020-08-21 20:31:33,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:31:33,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:33,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:31:33,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:31:33,545 INFO L87 Difference]: Start difference. First operand 42 states and 56 transitions. Second operand 9 states. [2020-08-21 20:31:33,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:33,716 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-08-21 20:31:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 20:31:33,718 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-21 20:31:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:33,720 INFO L225 Difference]: With dead ends: 49 [2020-08-21 20:31:33,721 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 20:31:33,722 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 [2020-08-21 20:31:33,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 20:31:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 20:31:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 20:31:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2020-08-21 20:31:33,742 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 41 [2020-08-21 20:31:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:33,746 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2020-08-21 20:31:33,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:31:33,746 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2020-08-21 20:31:33,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 20:31:33,750 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:33,750 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:33,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:31:33,751 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:33,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:33,752 INFO L82 PathProgramCache]: Analyzing trace with hash -943688704, now seen corresponding path program 5 times [2020-08-21 20:31:33,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:33,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855509875] [2020-08-21 20:31:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-21 20:31:33,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855509875] [2020-08-21 20:31:33,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:33,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 20:31:33,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298087568] [2020-08-21 20:31:33,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 20:31:33,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:33,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 20:31:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 20:31:33,959 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand 10 states. [2020-08-21 20:31:34,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:34,150 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2020-08-21 20:31:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 20:31:34,152 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-08-21 20:31:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:34,154 INFO L225 Difference]: With dead ends: 52 [2020-08-21 20:31:34,154 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 20:31:34,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-21 20:31:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 20:31:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 20:31:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 20:31:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2020-08-21 20:31:34,176 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 48 [2020-08-21 20:31:34,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:34,177 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2020-08-21 20:31:34,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 20:31:34,177 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2020-08-21 20:31:34,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 20:31:34,179 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:34,179 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:34,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 20:31:34,179 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:34,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:34,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1959654303, now seen corresponding path program 6 times [2020-08-21 20:31:34,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:34,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565263004] [2020-08-21 20:31:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-08-21 20:31:34,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565263004] [2020-08-21 20:31:34,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:34,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 20:31:34,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956244272] [2020-08-21 20:31:34,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 20:31:34,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:34,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 20:31:34,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:31:34,506 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand 11 states. [2020-08-21 20:31:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:34,706 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-08-21 20:31:34,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 20:31:34,707 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-08-21 20:31:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:34,708 INFO L225 Difference]: With dead ends: 55 [2020-08-21 20:31:34,709 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 20:31:34,709 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 [2020-08-21 20:31:34,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 20:31:34,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 20:31:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 20:31:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2020-08-21 20:31:34,718 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 55 [2020-08-21 20:31:34,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:34,718 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2020-08-21 20:31:34,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 20:31:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2020-08-21 20:31:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 20:31:34,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:34,721 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:34,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 20:31:34,721 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:34,722 INFO L82 PathProgramCache]: Analyzing trace with hash 75083370, now seen corresponding path program 7 times [2020-08-21 20:31:34,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:34,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869146698] [2020-08-21 20:31:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:34,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-08-21 20:31:35,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869146698] [2020-08-21 20:31:35,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:35,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 20:31:35,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848720581] [2020-08-21 20:31:35,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 20:31:35,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:35,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 20:31:35,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:31:35,024 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 12 states. [2020-08-21 20:31:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:35,223 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-08-21 20:31:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 20:31:35,223 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-08-21 20:31:35,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:35,225 INFO L225 Difference]: With dead ends: 58 [2020-08-21 20:31:35,225 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 20:31:35,228 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 [2020-08-21 20:31:35,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 20:31:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 20:31:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 20:31:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-08-21 20:31:35,242 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 62 [2020-08-21 20:31:35,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:35,243 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-08-21 20:31:35,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 20:31:35,243 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-08-21 20:31:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 20:31:35,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:35,247 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:35,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 20:31:35,247 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:35,248 INFO L82 PathProgramCache]: Analyzing trace with hash 980406709, now seen corresponding path program 8 times [2020-08-21 20:31:35,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:35,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79854264] [2020-08-21 20:31:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-08-21 20:31:35,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79854264] [2020-08-21 20:31:35,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:35,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 20:31:35,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958135602] [2020-08-21 20:31:35,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 20:31:35,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:35,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 20:31:35,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 20:31:35,541 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 13 states. [2020-08-21 20:31:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:35,746 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-08-21 20:31:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 20:31:35,747 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-08-21 20:31:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:35,749 INFO L225 Difference]: With dead ends: 61 [2020-08-21 20:31:35,749 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 20:31:35,750 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 [2020-08-21 20:31:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 20:31:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 20:31:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 20:31:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-08-21 20:31:35,770 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 69 [2020-08-21 20:31:35,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:35,771 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-08-21 20:31:35,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 20:31:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-08-21 20:31:35,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-21 20:31:35,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:35,775 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:35,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 20:31:35,775 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:35,778 INFO L82 PathProgramCache]: Analyzing trace with hash -654012460, now seen corresponding path program 9 times [2020-08-21 20:31:35,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:35,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214487264] [2020-08-21 20:31:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:35,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-08-21 20:31:36,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214487264] [2020-08-21 20:31:36,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:36,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 20:31:36,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809172569] [2020-08-21 20:31:36,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 20:31:36,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:36,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 20:31:36,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 20:31:36,156 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 14 states. [2020-08-21 20:31:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:36,370 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-08-21 20:31:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 20:31:36,371 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2020-08-21 20:31:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:36,372 INFO L225 Difference]: With dead ends: 64 [2020-08-21 20:31:36,373 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 20:31:36,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-21 20:31:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 20:31:36,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 20:31:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 20:31:36,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-08-21 20:31:36,381 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 76 [2020-08-21 20:31:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:36,382 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-08-21 20:31:36,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 20:31:36,382 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-08-21 20:31:36,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 20:31:36,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:36,384 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:36,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 20:31:36,384 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:36,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:36,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1057728309, now seen corresponding path program 10 times [2020-08-21 20:31:36,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:36,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602108497] [2020-08-21 20:31:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-08-21 20:31:36,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602108497] [2020-08-21 20:31:36,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:36,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 20:31:36,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471136192] [2020-08-21 20:31:36,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 20:31:36,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:36,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 20:31:36,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 20:31:36,777 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 15 states. [2020-08-21 20:31:37,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:37,022 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2020-08-21 20:31:37,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 20:31:37,023 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-21 20:31:37,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:37,024 INFO L225 Difference]: With dead ends: 67 [2020-08-21 20:31:37,024 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 20:31:37,026 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 [2020-08-21 20:31:37,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 20:31:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 20:31:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 20:31:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2020-08-21 20:31:37,033 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 83 [2020-08-21 20:31:37,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:37,033 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2020-08-21 20:31:37,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 20:31:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2020-08-21 20:31:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-21 20:31:37,035 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:37,035 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:37,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 20:31:37,036 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:37,036 INFO L82 PathProgramCache]: Analyzing trace with hash -2104461250, now seen corresponding path program 11 times [2020-08-21 20:31:37,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:37,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123171557] [2020-08-21 20:31:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-08-21 20:31:37,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123171557] [2020-08-21 20:31:37,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:37,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 20:31:37,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185939379] [2020-08-21 20:31:37,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 20:31:37,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:37,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 20:31:37,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 20:31:37,462 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 16 states. [2020-08-21 20:31:37,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:37,697 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2020-08-21 20:31:37,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 20:31:37,697 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2020-08-21 20:31:37,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:37,698 INFO L225 Difference]: With dead ends: 70 [2020-08-21 20:31:37,699 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 20:31:37,700 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 [2020-08-21 20:31:37,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 20:31:37,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-21 20:31:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 20:31:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2020-08-21 20:31:37,707 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 90 [2020-08-21 20:31:37,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:37,708 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2020-08-21 20:31:37,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 20:31:37,708 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2020-08-21 20:31:37,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 20:31:37,709 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:37,709 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:37,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 20:31:37,710 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:37,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:37,710 INFO L82 PathProgramCache]: Analyzing trace with hash 565979361, now seen corresponding path program 12 times [2020-08-21 20:31:37,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:37,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74924228] [2020-08-21 20:31:37,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:37,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-08-21 20:31:38,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74924228] [2020-08-21 20:31:38,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:38,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 20:31:38,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186914090] [2020-08-21 20:31:38,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 20:31:38,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:38,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 20:31:38,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 20:31:38,311 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand 17 states. [2020-08-21 20:31:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:38,593 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2020-08-21 20:31:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 20:31:38,593 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-08-21 20:31:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:38,594 INFO L225 Difference]: With dead ends: 73 [2020-08-21 20:31:38,594 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 20:31:38,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-21 20:31:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 20:31:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 20:31:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 20:31:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2020-08-21 20:31:38,602 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 97 [2020-08-21 20:31:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:38,603 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2020-08-21 20:31:38,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 20:31:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2020-08-21 20:31:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-21 20:31:38,604 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:38,604 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:38,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 20:31:38,605 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:38,605 INFO L82 PathProgramCache]: Analyzing trace with hash -106117208, now seen corresponding path program 13 times [2020-08-21 20:31:38,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:38,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727159028] [2020-08-21 20:31:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:38,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-08-21 20:31:39,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727159028] [2020-08-21 20:31:39,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:39,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 20:31:39,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540579232] [2020-08-21 20:31:39,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 20:31:39,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:39,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 20:31:39,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 20:31:39,134 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand 18 states. [2020-08-21 20:31:39,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:39,377 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-08-21 20:31:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 20:31:39,378 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 104 [2020-08-21 20:31:39,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:39,379 INFO L225 Difference]: With dead ends: 76 [2020-08-21 20:31:39,379 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 20:31:39,380 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 [2020-08-21 20:31:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 20:31:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 20:31:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 20:31:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-08-21 20:31:39,387 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 104 [2020-08-21 20:31:39,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:39,387 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-08-21 20:31:39,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 20:31:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-08-21 20:31:39,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-08-21 20:31:39,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:39,389 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:39,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 20:31:39,390 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:39,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:39,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1237836279, now seen corresponding path program 14 times [2020-08-21 20:31:39,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:39,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506573010] [2020-08-21 20:31:39,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:39,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-21 20:31:40,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506573010] [2020-08-21 20:31:40,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:40,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 20:31:40,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068832587] [2020-08-21 20:31:40,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 20:31:40,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:40,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 20:31:40,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 20:31:40,013 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 19 states. [2020-08-21 20:31:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:40,285 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-08-21 20:31:40,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 20:31:40,285 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2020-08-21 20:31:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:40,287 INFO L225 Difference]: With dead ends: 79 [2020-08-21 20:31:40,287 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 20:31:40,288 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 [2020-08-21 20:31:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 20:31:40,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-21 20:31:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 20:31:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2020-08-21 20:31:40,294 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 111 [2020-08-21 20:31:40,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:40,295 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2020-08-21 20:31:40,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 20:31:40,295 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2020-08-21 20:31:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-21 20:31:40,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:40,297 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:40,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 20:31:40,297 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:40,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:40,298 INFO L82 PathProgramCache]: Analyzing trace with hash 340319762, now seen corresponding path program 15 times [2020-08-21 20:31:40,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:40,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101440834] [2020-08-21 20:31:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-08-21 20:31:40,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101440834] [2020-08-21 20:31:40,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:40,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 20:31:40,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696769859] [2020-08-21 20:31:40,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 20:31:40,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:40,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 20:31:40,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 20:31:40,973 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 20 states. [2020-08-21 20:31:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:41,263 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-08-21 20:31:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 20:31:41,265 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 118 [2020-08-21 20:31:41,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:41,266 INFO L225 Difference]: With dead ends: 82 [2020-08-21 20:31:41,266 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 20:31:41,270 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 [2020-08-21 20:31:41,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 20:31:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 20:31:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 20:31:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-08-21 20:31:41,276 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 118 [2020-08-21 20:31:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:41,278 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-08-21 20:31:41,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 20:31:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-08-21 20:31:41,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-21 20:31:41,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:41,281 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:41,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 20:31:41,282 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:41,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:41,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1471685645, now seen corresponding path program 16 times [2020-08-21 20:31:41,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:41,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009755239] [2020-08-21 20:31:41,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:41,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-08-21 20:31:42,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009755239] [2020-08-21 20:31:42,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:42,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 20:31:42,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301895238] [2020-08-21 20:31:42,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 20:31:42,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:42,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 20:31:42,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 20:31:42,076 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 21 states. [2020-08-21 20:31:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:42,363 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-08-21 20:31:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 20:31:42,363 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2020-08-21 20:31:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:42,365 INFO L225 Difference]: With dead ends: 85 [2020-08-21 20:31:42,365 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 20:31:42,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 20:31:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 20:31:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-21 20:31:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 20:31:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-08-21 20:31:42,374 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 125 [2020-08-21 20:31:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:42,375 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-08-21 20:31:42,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 20:31:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-08-21 20:31:42,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-21 20:31:42,377 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:42,377 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:42,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 20:31:42,378 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:42,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1481368708, now seen corresponding path program 17 times [2020-08-21 20:31:42,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:42,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001833138] [2020-08-21 20:31:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:42,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:43,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:43,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:43,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:43,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:43,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:43,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-08-21 20:31:43,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001833138] [2020-08-21 20:31:43,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:43,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 20:31:43,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952935449] [2020-08-21 20:31:43,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 20:31:43,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:43,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 20:31:43,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 20:31:43,393 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 22 states. [2020-08-21 20:31:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:43,713 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-21 20:31:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 20:31:43,714 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 132 [2020-08-21 20:31:43,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:43,715 INFO L225 Difference]: With dead ends: 88 [2020-08-21 20:31:43,715 INFO L226 Difference]: Without dead ends: 84 [2020-08-21 20:31:43,716 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 [2020-08-21 20:31:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-21 20:31:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-21 20:31:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 20:31:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2020-08-21 20:31:43,722 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 132 [2020-08-21 20:31:43,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:43,723 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2020-08-21 20:31:43,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 20:31:43,723 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2020-08-21 20:31:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-21 20:31:43,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:43,725 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:43,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 20:31:43,725 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:43,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:43,726 INFO L82 PathProgramCache]: Analyzing trace with hash -103968989, now seen corresponding path program 18 times [2020-08-21 20:31:43,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:43,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404834447] [2020-08-21 20:31:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:43,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:43,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:43,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:43,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:43,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-08-21 20:31:44,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404834447] [2020-08-21 20:31:44,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:44,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 20:31:44,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869035924] [2020-08-21 20:31:44,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 20:31:44,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:44,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 20:31:44,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 20:31:44,749 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand 23 states. [2020-08-21 20:31:45,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:45,099 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-08-21 20:31:45,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 20:31:45,099 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2020-08-21 20:31:45,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:45,101 INFO L225 Difference]: With dead ends: 91 [2020-08-21 20:31:45,101 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 20:31:45,102 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 [2020-08-21 20:31:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 20:31:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-21 20:31:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 20:31:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2020-08-21 20:31:45,114 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 139 [2020-08-21 20:31:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:45,115 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2020-08-21 20:31:45,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 20:31:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2020-08-21 20:31:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-21 20:31:45,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:45,117 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:45,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 20:31:45,118 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:45,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:45,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1432494106, now seen corresponding path program 19 times [2020-08-21 20:31:45,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:45,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147203180] [2020-08-21 20:31:45,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:45,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:46,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:46,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2020-08-21 20:31:46,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147203180] [2020-08-21 20:31:46,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:46,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 20:31:46,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526566948] [2020-08-21 20:31:46,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 20:31:46,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:46,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 20:31:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 20:31:46,292 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand 24 states. [2020-08-21 20:31:46,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:46,693 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-08-21 20:31:46,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 20:31:46,693 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2020-08-21 20:31:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:46,694 INFO L225 Difference]: With dead ends: 94 [2020-08-21 20:31:46,694 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 20:31:46,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-21 20:31:46,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 20:31:46,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-21 20:31:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 20:31:46,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2020-08-21 20:31:46,702 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 146 [2020-08-21 20:31:46,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:46,702 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2020-08-21 20:31:46,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 20:31:46,702 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2020-08-21 20:31:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-08-21 20:31:46,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:46,704 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:46,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 20:31:46,705 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:46,705 INFO L82 PathProgramCache]: Analyzing trace with hash -873938119, now seen corresponding path program 20 times [2020-08-21 20:31:46,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:46,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251058045] [2020-08-21 20:31:46,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:46,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:46,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:46,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:46,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:46,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:46,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-08-21 20:31:47,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251058045] [2020-08-21 20:31:47,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:47,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 20:31:47,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891226964] [2020-08-21 20:31:47,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 20:31:47,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:47,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 20:31:47,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-21 20:31:47,743 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand 25 states. [2020-08-21 20:31:48,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:48,172 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2020-08-21 20:31:48,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 20:31:48,173 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 153 [2020-08-21 20:31:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:48,174 INFO L225 Difference]: With dead ends: 97 [2020-08-21 20:31:48,175 INFO L226 Difference]: Without dead ends: 93 [2020-08-21 20:31:48,179 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 [2020-08-21 20:31:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-21 20:31:48,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-21 20:31:48,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 20:31:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2020-08-21 20:31:48,187 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 153 [2020-08-21 20:31:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:48,188 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2020-08-21 20:31:48,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 20:31:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2020-08-21 20:31:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-08-21 20:31:48,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:48,191 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:48,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 20:31:48,192 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:48,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1461029712, now seen corresponding path program 21 times [2020-08-21 20:31:48,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:48,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894513719] [2020-08-21 20:31:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:48,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:48,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:48,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:48,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:48,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:48,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:48,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:48,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:48,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:48,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:48,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:48,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:48,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:49,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:49,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:49,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:49,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:49,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:49,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:49,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:49,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:49,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:49,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2020-08-21 20:31:49,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894513719] [2020-08-21 20:31:49,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:49,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 20:31:49,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637769451] [2020-08-21 20:31:49,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 20:31:49,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:49,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 20:31:49,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-21 20:31:49,477 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand 26 states. [2020-08-21 20:31:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:49,921 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-08-21 20:31:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 20:31:49,921 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 160 [2020-08-21 20:31:49,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:49,922 INFO L225 Difference]: With dead ends: 100 [2020-08-21 20:31:49,923 INFO L226 Difference]: Without dead ends: 96 [2020-08-21 20:31:49,925 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 [2020-08-21 20:31:49,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-21 20:31:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-08-21 20:31:49,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 20:31:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-08-21 20:31:49,931 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 160 [2020-08-21 20:31:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:49,932 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-08-21 20:31:49,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 20:31:49,932 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-08-21 20:31:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-08-21 20:31:49,934 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:49,934 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:49,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 20:31:49,934 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:49,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:49,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1249222577, now seen corresponding path program 22 times [2020-08-21 20:31:49,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:49,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668235661] [2020-08-21 20:31:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:50,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:51,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:51,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-08-21 20:31:51,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668235661] [2020-08-21 20:31:51,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:51,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 20:31:51,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117909680] [2020-08-21 20:31:51,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 20:31:51,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:51,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 20:31:51,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-21 20:31:51,284 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 27 states. [2020-08-21 20:31:51,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:51,743 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2020-08-21 20:31:51,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 20:31:51,743 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 167 [2020-08-21 20:31:51,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:51,745 INFO L225 Difference]: With dead ends: 103 [2020-08-21 20:31:51,746 INFO L226 Difference]: Without dead ends: 99 [2020-08-21 20:31:51,749 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 [2020-08-21 20:31:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-21 20:31:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-08-21 20:31:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 20:31:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2020-08-21 20:31:51,756 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 167 [2020-08-21 20:31:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:51,757 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2020-08-21 20:31:51,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 20:31:51,757 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2020-08-21 20:31:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-08-21 20:31:51,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:51,759 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:51,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 20:31:51,762 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:51,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:51,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1284144570, now seen corresponding path program 23 times [2020-08-21 20:31:51,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:51,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744283766] [2020-08-21 20:31:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:51,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:51,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:51,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:51,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:52,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-08-21 20:31:53,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744283766] [2020-08-21 20:31:53,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:53,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 20:31:53,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405235132] [2020-08-21 20:31:53,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 20:31:53,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:53,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 20:31:53,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-21 20:31:53,091 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand 28 states. [2020-08-21 20:31:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:53,551 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-08-21 20:31:53,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-21 20:31:53,552 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 174 [2020-08-21 20:31:53,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:53,553 INFO L225 Difference]: With dead ends: 106 [2020-08-21 20:31:53,554 INFO L226 Difference]: Without dead ends: 102 [2020-08-21 20:31:53,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2020-08-21 20:31:53,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-21 20:31:53,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-08-21 20:31:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-21 20:31:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2020-08-21 20:31:53,563 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 174 [2020-08-21 20:31:53,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:53,564 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2020-08-21 20:31:53,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 20:31:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2020-08-21 20:31:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-21 20:31:53,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:53,566 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:53,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 20:31:53,567 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:53,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1205012069, now seen corresponding path program 24 times [2020-08-21 20:31:53,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:53,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936774867] [2020-08-21 20:31:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:53,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:53,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:53,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:53,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:53,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:53,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:53,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:54,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-08-21 20:31:55,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936774867] [2020-08-21 20:31:55,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:55,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 20:31:55,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159853411] [2020-08-21 20:31:55,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 20:31:55,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:55,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 20:31:55,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-21 20:31:55,020 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand 29 states. [2020-08-21 20:31:55,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:55,514 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2020-08-21 20:31:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-21 20:31:55,515 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 181 [2020-08-21 20:31:55,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:55,516 INFO L225 Difference]: With dead ends: 109 [2020-08-21 20:31:55,516 INFO L226 Difference]: Without dead ends: 105 [2020-08-21 20:31:55,518 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 [2020-08-21 20:31:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-21 20:31:55,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-08-21 20:31:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 20:31:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2020-08-21 20:31:55,524 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 181 [2020-08-21 20:31:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:55,525 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2020-08-21 20:31:55,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 20:31:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2020-08-21 20:31:55,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-08-21 20:31:55,527 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:55,527 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:55,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 20:31:55,528 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:55,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:55,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1312024796, now seen corresponding path program 25 times [2020-08-21 20:31:55,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:55,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40075847] [2020-08-21 20:31:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:55,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:55,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:55,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:55,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:55,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:55,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:55,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:56,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2020-08-21 20:31:57,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40075847] [2020-08-21 20:31:57,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:57,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 20:31:57,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016964187] [2020-08-21 20:31:57,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 20:31:57,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:57,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 20:31:57,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-21 20:31:57,065 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand 30 states. [2020-08-21 20:31:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:57,585 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2020-08-21 20:31:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 20:31:57,586 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 188 [2020-08-21 20:31:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:57,587 INFO L225 Difference]: With dead ends: 112 [2020-08-21 20:31:57,588 INFO L226 Difference]: Without dead ends: 108 [2020-08-21 20:31:57,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1136, Invalid=1944, Unknown=0, NotChecked=0, Total=3080 [2020-08-21 20:31:57,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-21 20:31:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-08-21 20:31:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-21 20:31:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2020-08-21 20:31:57,595 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 188 [2020-08-21 20:31:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:57,595 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2020-08-21 20:31:57,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 20:31:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2020-08-21 20:31:57,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-21 20:31:57,597 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:57,597 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:57,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 20:31:57,597 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:57,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:57,598 INFO L82 PathProgramCache]: Analyzing trace with hash 461591931, now seen corresponding path program 26 times [2020-08-21 20:31:57,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:57,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588728914] [2020-08-21 20:31:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:57,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:57,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:57,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:57,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:57,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:57,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:57,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:58,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-08-21 20:31:59,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588728914] [2020-08-21 20:31:59,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:31:59,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-21 20:31:59,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420591096] [2020-08-21 20:31:59,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-21 20:31:59,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:31:59,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-21 20:31:59,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-21 20:31:59,106 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand 31 states. [2020-08-21 20:31:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:31:59,633 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2020-08-21 20:31:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 20:31:59,633 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 195 [2020-08-21 20:31:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:31:59,635 INFO L225 Difference]: With dead ends: 115 [2020-08-21 20:31:59,635 INFO L226 Difference]: Without dead ends: 111 [2020-08-21 20:31:59,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1220, Invalid=2086, Unknown=0, NotChecked=0, Total=3306 [2020-08-21 20:31:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-21 20:31:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-08-21 20:31:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-21 20:31:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2020-08-21 20:31:59,642 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 195 [2020-08-21 20:31:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:31:59,643 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2020-08-21 20:31:59,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-21 20:31:59,643 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2020-08-21 20:31:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-08-21 20:31:59,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:31:59,645 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:31:59,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 20:31:59,645 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:31:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:31:59,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1460254606, now seen corresponding path program 27 times [2020-08-21 20:31:59,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:31:59,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67791177] [2020-08-21 20:31:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:31:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:59,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:31:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:59,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:31:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:59,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:59,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:59,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:31:59,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:31:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:00,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:01,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:01,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:01,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:01,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2020-08-21 20:32:01,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67791177] [2020-08-21 20:32:01,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:32:01,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 20:32:01,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304723808] [2020-08-21 20:32:01,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 20:32:01,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:32:01,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 20:32:01,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-21 20:32:01,583 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand 32 states. [2020-08-21 20:32:02,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:32:02,155 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2020-08-21 20:32:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-21 20:32:02,155 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 202 [2020-08-21 20:32:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:32:02,157 INFO L225 Difference]: With dead ends: 118 [2020-08-21 20:32:02,157 INFO L226 Difference]: Without dead ends: 114 [2020-08-21 20:32:02,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1307, Invalid=2233, Unknown=0, NotChecked=0, Total=3540 [2020-08-21 20:32:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-21 20:32:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-08-21 20:32:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 20:32:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2020-08-21 20:32:02,165 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 202 [2020-08-21 20:32:02,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:32:02,165 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2020-08-21 20:32:02,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 20:32:02,165 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2020-08-21 20:32:02,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-08-21 20:32:02,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:32:02,167 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:32:02,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 20:32:02,167 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:32:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:32:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash 788262289, now seen corresponding path program 28 times [2020-08-21 20:32:02,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:32:02,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123970187] [2020-08-21 20:32:02,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:32:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:32:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:32:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:02,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:03,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:03,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:03,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:03,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:03,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:03,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:03,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:03,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:03,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:03,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:03,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:03,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:03,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-08-21 20:32:04,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123970187] [2020-08-21 20:32:04,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:32:04,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-21 20:32:04,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606384638] [2020-08-21 20:32:04,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-21 20:32:04,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:32:04,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-21 20:32:04,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 20:32:04,056 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand 33 states. [2020-08-21 20:32:04,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:32:04,648 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-08-21 20:32:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-21 20:32:04,648 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 209 [2020-08-21 20:32:04,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:32:04,650 INFO L225 Difference]: With dead ends: 121 [2020-08-21 20:32:04,650 INFO L226 Difference]: Without dead ends: 117 [2020-08-21 20:32:04,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1397, Invalid=2385, Unknown=0, NotChecked=0, Total=3782 [2020-08-21 20:32:04,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-08-21 20:32:04,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-08-21 20:32:04,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-21 20:32:04,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2020-08-21 20:32:04,664 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 209 [2020-08-21 20:32:04,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:32:04,664 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2020-08-21 20:32:04,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-21 20:32:04,665 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2020-08-21 20:32:04,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-08-21 20:32:04,667 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:32:04,667 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:32:04,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 20:32:04,668 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:32:04,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:32:04,668 INFO L82 PathProgramCache]: Analyzing trace with hash -674054408, now seen corresponding path program 29 times [2020-08-21 20:32:04,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:32:04,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066249223] [2020-08-21 20:32:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:32:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:04,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:32:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:04,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:32:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:04,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:04,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:04,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:04,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:05,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:06,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:06,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:06,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:06,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2020-08-21 20:32:06,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066249223] [2020-08-21 20:32:06,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:32:06,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-21 20:32:06,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897649686] [2020-08-21 20:32:06,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-21 20:32:06,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:32:06,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-21 20:32:06,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 20:32:06,471 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand 34 states. [2020-08-21 20:32:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:32:07,058 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2020-08-21 20:32:07,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-21 20:32:07,059 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 216 [2020-08-21 20:32:07,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:32:07,060 INFO L225 Difference]: With dead ends: 124 [2020-08-21 20:32:07,060 INFO L226 Difference]: Without dead ends: 120 [2020-08-21 20:32:07,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1490, Invalid=2542, Unknown=0, NotChecked=0, Total=4032 [2020-08-21 20:32:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-21 20:32:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-08-21 20:32:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 20:32:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 134 transitions. [2020-08-21 20:32:07,068 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 134 transitions. Word has length 216 [2020-08-21 20:32:07,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:32:07,068 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 134 transitions. [2020-08-21 20:32:07,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-21 20:32:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 134 transitions. [2020-08-21 20:32:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-08-21 20:32:07,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:32:07,070 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:32:07,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 20:32:07,071 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:32:07,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:32:07,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1144876711, now seen corresponding path program 30 times [2020-08-21 20:32:07,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:32:07,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106553739] [2020-08-21 20:32:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:32:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:07,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:32:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:07,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:32:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:07,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:07,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:07,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:07,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:07,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:07,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:07,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:07,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:07,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:07,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:08,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-08-21 20:32:09,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106553739] [2020-08-21 20:32:09,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:32:09,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-21 20:32:09,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118299463] [2020-08-21 20:32:09,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-21 20:32:09,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:32:09,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-21 20:32:09,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 20:32:09,243 INFO L87 Difference]: Start difference. First operand 120 states and 134 transitions. Second operand 35 states. [2020-08-21 20:32:09,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:32:09,869 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2020-08-21 20:32:09,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-21 20:32:09,870 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 223 [2020-08-21 20:32:09,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:32:09,871 INFO L225 Difference]: With dead ends: 127 [2020-08-21 20:32:09,872 INFO L226 Difference]: Without dead ends: 123 [2020-08-21 20:32:09,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1586, Invalid=2704, Unknown=0, NotChecked=0, Total=4290 [2020-08-21 20:32:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-08-21 20:32:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-08-21 20:32:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-21 20:32:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2020-08-21 20:32:09,880 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 223 [2020-08-21 20:32:09,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:32:09,881 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2020-08-21 20:32:09,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-21 20:32:09,881 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2020-08-21 20:32:09,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-08-21 20:32:09,882 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:32:09,883 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:32:09,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 20:32:09,883 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:32:09,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:32:09,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1122595486, now seen corresponding path program 31 times [2020-08-21 20:32:09,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:32:09,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073229574] [2020-08-21 20:32:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:32:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:09,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:32:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:09,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:32:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:10,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:11,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2020-08-21 20:32:12,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073229574] [2020-08-21 20:32:12,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:32:12,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-21 20:32:12,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245000321] [2020-08-21 20:32:12,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-21 20:32:12,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:32:12,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-21 20:32:12,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 20:32:12,111 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand 36 states. [2020-08-21 20:32:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:32:12,754 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2020-08-21 20:32:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-21 20:32:12,754 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 230 [2020-08-21 20:32:12,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:32:12,756 INFO L225 Difference]: With dead ends: 130 [2020-08-21 20:32:12,756 INFO L226 Difference]: Without dead ends: 126 [2020-08-21 20:32:12,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1685, Invalid=2871, Unknown=0, NotChecked=0, Total=4556 [2020-08-21 20:32:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-21 20:32:12,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-08-21 20:32:12,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-21 20:32:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 140 transitions. [2020-08-21 20:32:12,763 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 140 transitions. Word has length 230 [2020-08-21 20:32:12,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:32:12,764 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 140 transitions. [2020-08-21 20:32:12,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-21 20:32:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 140 transitions. [2020-08-21 20:32:12,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-08-21 20:32:12,766 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:32:12,766 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:32:12,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 20:32:12,767 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:32:12,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:32:12,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1055422653, now seen corresponding path program 32 times [2020-08-21 20:32:12,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:32:12,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299193418] [2020-08-21 20:32:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:32:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:12,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:32:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:12,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:32:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:12,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:12,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:13,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-08-21 20:32:14,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299193418] [2020-08-21 20:32:14,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:32:14,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-21 20:32:14,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64891029] [2020-08-21 20:32:14,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-21 20:32:14,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:32:14,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-21 20:32:14,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 20:32:14,980 INFO L87 Difference]: Start difference. First operand 126 states and 140 transitions. Second operand 37 states. [2020-08-21 20:32:15,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:32:15,705 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2020-08-21 20:32:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-21 20:32:15,706 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 237 [2020-08-21 20:32:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:32:15,707 INFO L225 Difference]: With dead ends: 133 [2020-08-21 20:32:15,708 INFO L226 Difference]: Without dead ends: 129 [2020-08-21 20:32:15,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1787, Invalid=3043, Unknown=0, NotChecked=0, Total=4830 [2020-08-21 20:32:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-21 20:32:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-08-21 20:32:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-21 20:32:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2020-08-21 20:32:15,715 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 237 [2020-08-21 20:32:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:32:15,716 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2020-08-21 20:32:15,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-21 20:32:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2020-08-21 20:32:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-08-21 20:32:15,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:32:15,718 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:32:15,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-21 20:32:15,718 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:32:15,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:32:15,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1624997172, now seen corresponding path program 33 times [2020-08-21 20:32:15,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:32:15,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755748983] [2020-08-21 20:32:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:32:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:15,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:32:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:15,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:32:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:15,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:16,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:17,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:17,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:17,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:17,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:17,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:17,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:17,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:17,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:17,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:17,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:17,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:17,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:17,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2020-08-21 20:32:18,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755748983] [2020-08-21 20:32:18,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:32:18,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-21 20:32:18,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314819087] [2020-08-21 20:32:18,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-21 20:32:18,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:32:18,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-21 20:32:18,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 20:32:18,091 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand 38 states. [2020-08-21 20:32:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:32:18,808 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-08-21 20:32:18,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-21 20:32:18,809 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 244 [2020-08-21 20:32:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:32:18,810 INFO L225 Difference]: With dead ends: 136 [2020-08-21 20:32:18,810 INFO L226 Difference]: Without dead ends: 132 [2020-08-21 20:32:18,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1892, Invalid=3220, Unknown=0, NotChecked=0, Total=5112 [2020-08-21 20:32:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-21 20:32:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-08-21 20:32:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-21 20:32:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2020-08-21 20:32:18,818 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 244 [2020-08-21 20:32:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:32:18,818 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2020-08-21 20:32:18,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-21 20:32:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2020-08-21 20:32:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-08-21 20:32:18,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:32:18,821 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:32:18,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-21 20:32:18,821 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:32:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:32:18,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2109887533, now seen corresponding path program 34 times [2020-08-21 20:32:18,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:32:18,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303428997] [2020-08-21 20:32:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:32:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:18,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:32:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:18,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:32:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:18,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:19,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:20,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-08-21 20:32:21,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303428997] [2020-08-21 20:32:21,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:32:21,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-21 20:32:21,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576517079] [2020-08-21 20:32:21,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-21 20:32:21,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:32:21,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-21 20:32:21,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2020-08-21 20:32:21,255 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand 39 states. [2020-08-21 20:32:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:32:22,034 INFO L93 Difference]: Finished difference Result 139 states and 153 transitions. [2020-08-21 20:32:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-21 20:32:22,035 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 251 [2020-08-21 20:32:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:32:22,037 INFO L225 Difference]: With dead ends: 139 [2020-08-21 20:32:22,037 INFO L226 Difference]: Without dead ends: 135 [2020-08-21 20:32:22,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2000, Invalid=3402, Unknown=0, NotChecked=0, Total=5402 [2020-08-21 20:32:22,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-08-21 20:32:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-08-21 20:32:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-08-21 20:32:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 149 transitions. [2020-08-21 20:32:22,050 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 149 transitions. Word has length 251 [2020-08-21 20:32:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:32:22,051 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 149 transitions. [2020-08-21 20:32:22,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-21 20:32:22,051 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 149 transitions. [2020-08-21 20:32:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-08-21 20:32:22,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:32:22,053 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:32:22,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-21 20:32:22,053 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:32:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:32:22,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1202454326, now seen corresponding path program 35 times [2020-08-21 20:32:22,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:32:22,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158605887] [2020-08-21 20:32:22,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:32:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:22,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:32:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:22,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 20:32:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:22,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:22,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:22,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:22,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:22,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:32:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:32:22,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3