/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --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/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:22:49,334 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-22 01:22:49,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:22:49,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:22:49,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:22:49,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:22:49,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:22:49,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:22:49,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:22:49,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:22:49,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:22:49,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:22:49,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:22:49,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:22:49,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:22:49,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:22:49,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:22:49,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:22:49,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:22:49,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:22:49,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:22:49,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:22:49,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 01:22:49,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:22:49,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:22:49,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:22:49,474 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 [2020-08-22 01:22:49,513 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:22:49,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:22:49,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:22:49,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:22:49,516 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:22:49,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:22:49,517 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:22:49,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:22:49,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:22:49,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:22:49,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:22:49,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:22:49,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:22:49,519 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:22:49,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:22:49,520 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:22:49,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:22:49,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:22:49,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:22:49,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:22:49,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:22:49,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:22:49,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:22:49,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:22:49,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:22:49,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:22:49,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:22:49,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:22:49,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:22:49,523 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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:22:49,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:22:49,865 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:22:49,870 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:22:49,872 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:22:49,872 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:22:49,873 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-08-22 01:22:49,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3961aaa4a/f481a2938b114252b9896ed7800eb8ce/FLAGdb6fa9a92 [2020-08-22 01:22:50,392 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:22:50,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-08-22 01:22:50,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3961aaa4a/f481a2938b114252b9896ed7800eb8ce/FLAGdb6fa9a92 [2020-08-22 01:22:50,737 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3961aaa4a/f481a2938b114252b9896ed7800eb8ce [2020-08-22 01:22:50,748 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:22:50,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:22:50,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:22:50,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:22:50,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:22:50,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:22:50" (1/1) ... [2020-08-22 01:22:50,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743cee4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:50, skipping insertion in model container [2020-08-22 01:22:50,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:22:50" (1/1) ... [2020-08-22 01:22:50,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:22:50,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:22:50,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:22:50,955 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:22:50,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:22:50,983 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:22:50,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:50 WrapperNode [2020-08-22 01:22:50,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:22:50,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:22:50,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:22:50,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:22:50,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:50" (1/1) ... [2020-08-22 01:22:50,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:50" (1/1) ... [2020-08-22 01:22:51,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:50" (1/1) ... [2020-08-22 01:22:51,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:50" (1/1) ... [2020-08-22 01:22:51,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:50" (1/1) ... [2020-08-22 01:22:51,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:50" (1/1) ... [2020-08-22 01:22:51,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:50" (1/1) ... [2020-08-22 01:22:51,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:22:51,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:22:51,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:22:51,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:22:51,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:50" (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 [2020-08-22 01:22:51,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:22:51,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:22:51,167 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-08-22 01:22:51,168 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-08-22 01:22:51,168 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:22:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:22:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 01:22:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-08-22 01:22:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-08-22 01:22:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:22:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:22:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:22:51,384 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:22:51,384 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 01:22:51,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:22:51 BoogieIcfgContainer [2020-08-22 01:22:51,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:22:51,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:22:51,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:22:51,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:22:51,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:22:50" (1/3) ... [2020-08-22 01:22:51,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d39d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:22:51, skipping insertion in model container [2020-08-22 01:22:51,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:50" (2/3) ... [2020-08-22 01:22:51,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d39d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:22:51, skipping insertion in model container [2020-08-22 01:22:51,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:22:51" (3/3) ... [2020-08-22 01:22:51,400 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-08-22 01:22:51,413 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:22:51,423 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:22:51,447 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:22:51,492 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:22:51,493 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:22:51,493 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:22:51,493 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:22:51,493 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:22:51,493 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:22:51,494 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:22:51,494 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:22:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-22 01:22:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 01:22:51,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:51,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:51,530 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:51,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:51,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2122072279, now seen corresponding path program 1 times [2020-08-22 01:22:51,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:51,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780316744] [2020-08-22 01:22:51,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,905 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2020-08-22 01:22:51,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:22:52,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780316744] [2020-08-22 01:22:52,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:22:52,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:22:52,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463292224] [2020-08-22 01:22:52,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:22:52,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:52,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:22:52,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:52,056 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-08-22 01:22:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:52,178 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-08-22 01:22:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:22:52,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-22 01:22:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:52,192 INFO L225 Difference]: With dead ends: 41 [2020-08-22 01:22:52,192 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 01:22:52,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:22:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 01:22:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 01:22:52,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 01:22:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-22 01:22:52,241 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-08-22 01:22:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:52,241 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-22 01:22:52,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:22:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-22 01:22:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 01:22:52,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:52,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:52,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:22:52,245 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash -612070348, now seen corresponding path program 1 times [2020-08-22 01:22:52,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:52,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473357316] [2020-08-22 01:22:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:22:52,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473357316] [2020-08-22 01:22:52,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:22:52,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 01:22:52,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357773643] [2020-08-22 01:22:52,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:22:52,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:52,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:22:52,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:22:52,476 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-08-22 01:22:52,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:52,587 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-22 01:22:52,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:22:52,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-08-22 01:22:52,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:52,589 INFO L225 Difference]: With dead ends: 33 [2020-08-22 01:22:52,589 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 01:22:52,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:22:52,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 01:22:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-22 01:22:52,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 01:22:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-22 01:22:52,600 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2020-08-22 01:22:52,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:52,600 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-22 01:22:52,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:22:52,601 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-22 01:22:52,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 01:22:52,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:52,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:52,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:22:52,603 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:52,603 INFO L82 PathProgramCache]: Analyzing trace with hash -592576498, now seen corresponding path program 1 times [2020-08-22 01:22:52,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:52,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770074502] [2020-08-22 01:22:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:22:52,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770074502] [2020-08-22 01:22:52,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:22:52,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:22:52,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280247557] [2020-08-22 01:22:52,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:22:52,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:52,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:22:52,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:52,705 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-08-22 01:22:52,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:52,763 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-08-22 01:22:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:22:52,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-22 01:22:52,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:52,766 INFO L225 Difference]: With dead ends: 41 [2020-08-22 01:22:52,766 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 01:22:52,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:52,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 01:22:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-22 01:22:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 01:22:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-22 01:22:52,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-08-22 01:22:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:52,784 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-22 01:22:52,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:22:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-22 01:22:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:22:52,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:52,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:52,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:22:52,805 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:52,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1306118367, now seen corresponding path program 1 times [2020-08-22 01:22:52,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:52,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31548288] [2020-08-22 01:22:52,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:22:53,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31548288] [2020-08-22 01:22:53,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:22:53,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 01:22:53,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177679250] [2020-08-22 01:22:53,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:22:53,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:53,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:22:53,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:22:53,031 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2020-08-22 01:22:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:53,185 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-08-22 01:22:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:22:53,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-08-22 01:22:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:53,187 INFO L225 Difference]: With dead ends: 36 [2020-08-22 01:22:53,187 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 01:22:53,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:22:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 01:22:53,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-22 01:22:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 01:22:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-22 01:22:53,195 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-08-22 01:22:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:53,196 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-22 01:22:53,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:22:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-22 01:22:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 01:22:53,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:53,198 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:53,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:22:53,198 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:53,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:53,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1571291849, now seen corresponding path program 1 times [2020-08-22 01:22:53,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:53,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579447853] [2020-08-22 01:22:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:22:53,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579447853] [2020-08-22 01:22:53,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:22:53,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:22:53,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237906917] [2020-08-22 01:22:53,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:22:53,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:53,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:22:53,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:53,278 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-08-22 01:22:53,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:53,323 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-08-22 01:22:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:22:53,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-22 01:22:53,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:53,325 INFO L225 Difference]: With dead ends: 42 [2020-08-22 01:22:53,325 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 01:22:53,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:53,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 01:22:53,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 01:22:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 01:22:53,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-22 01:22:53,333 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-08-22 01:22:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:53,333 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-22 01:22:53,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:22:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-22 01:22:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 01:22:53,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:53,335 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:53,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:22:53,335 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:53,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1610221656, now seen corresponding path program 1 times [2020-08-22 01:22:53,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:53,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773892475] [2020-08-22 01:22:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 01:22:53,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773892475] [2020-08-22 01:22:53,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:53,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 01:22:53,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67629785] [2020-08-22 01:22:53,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 01:22:53,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:53,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 01:22:53,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:22:53,608 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2020-08-22 01:22:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:53,883 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-08-22 01:22:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 01:22:53,883 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-08-22 01:22:53,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:53,885 INFO L225 Difference]: With dead ends: 42 [2020-08-22 01:22:53,885 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 01:22:53,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:22:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 01:22:53,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-08-22 01:22:53,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 01:22:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-22 01:22:53,894 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2020-08-22 01:22:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:53,894 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-22 01:22:53,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 01:22:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-22 01:22:53,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 01:22:53,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:53,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:53,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:22:53,897 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1417612799, now seen corresponding path program 1 times [2020-08-22 01:22:53,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:53,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440861591] [2020-08-22 01:22:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 01:22:54,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440861591] [2020-08-22 01:22:54,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:54,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 01:22:54,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487334112] [2020-08-22 01:22:54,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 01:22:54,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:54,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 01:22:54,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:22:54,189 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 14 states. [2020-08-22 01:22:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:54,491 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-22 01:22:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 01:22:54,491 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-08-22 01:22:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:54,492 INFO L225 Difference]: With dead ends: 48 [2020-08-22 01:22:54,496 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 01:22:54,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:22:54,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 01:22:54,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-08-22 01:22:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 01:22:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-22 01:22:54,509 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 36 [2020-08-22 01:22:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:54,511 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-22 01:22:54,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 01:22:54,512 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-22 01:22:54,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 01:22:54,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:54,513 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:54,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:22:54,513 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:54,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:54,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1668529660, now seen corresponding path program 2 times [2020-08-22 01:22:54,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:54,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574288662] [2020-08-22 01:22:54,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-22 01:22:54,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574288662] [2020-08-22 01:22:54,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:54,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 01:22:54,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878571123] [2020-08-22 01:22:54,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 01:22:54,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:54,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 01:22:54,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:22:54,878 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 16 states. [2020-08-22 01:22:55,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:55,247 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-08-22 01:22:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:22:55,247 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-08-22 01:22:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:55,248 INFO L225 Difference]: With dead ends: 54 [2020-08-22 01:22:55,249 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 01:22:55,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:22:55,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 01:22:55,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-08-22 01:22:55,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 01:22:55,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-22 01:22:55,261 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2020-08-22 01:22:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:55,261 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-22 01:22:55,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 01:22:55,261 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-22 01:22:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 01:22:55,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:55,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:55,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:22:55,267 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:55,268 INFO L82 PathProgramCache]: Analyzing trace with hash -150927713, now seen corresponding path program 2 times [2020-08-22 01:22:55,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:55,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622763127] [2020-08-22 01:22:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-08-22 01:22:55,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622763127] [2020-08-22 01:22:55,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:55,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 01:22:55,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356590250] [2020-08-22 01:22:55,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 01:22:55,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:55,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 01:22:55,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:22:55,737 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 18 states. [2020-08-22 01:22:56,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:56,233 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-08-22 01:22:56,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:22:56,234 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-22 01:22:56,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:56,235 INFO L225 Difference]: With dead ends: 60 [2020-08-22 01:22:56,235 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 01:22:56,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2020-08-22 01:22:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 01:22:56,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-08-22 01:22:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 01:22:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-22 01:22:56,243 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 50 [2020-08-22 01:22:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:56,244 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-22 01:22:56,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 01:22:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-22 01:22:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 01:22:56,245 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:56,245 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:56,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:22:56,246 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:56,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:56,246 INFO L82 PathProgramCache]: Analyzing trace with hash -308892384, now seen corresponding path program 3 times [2020-08-22 01:22:56,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:56,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618976832] [2020-08-22 01:22:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 01:22:56,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618976832] [2020-08-22 01:22:56,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:56,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 01:22:56,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616525702] [2020-08-22 01:22:56,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 01:22:56,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:56,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 01:22:56,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:22:56,814 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2020-08-22 01:22:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:57,403 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-08-22 01:22:57,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:22:57,403 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-08-22 01:22:57,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:57,405 INFO L225 Difference]: With dead ends: 66 [2020-08-22 01:22:57,405 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 01:22:57,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 01:22:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 01:22:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-08-22 01:22:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 01:22:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-08-22 01:22:57,413 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 57 [2020-08-22 01:22:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:57,414 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-08-22 01:22:57,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 01:22:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-08-22 01:22:57,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 01:22:57,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:57,415 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:57,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:22:57,415 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:57,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1668346559, now seen corresponding path program 3 times [2020-08-22 01:22:57,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:57,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544317864] [2020-08-22 01:22:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-22 01:22:57,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544317864] [2020-08-22 01:22:57,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:57,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 01:22:57,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723042785] [2020-08-22 01:22:57,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 01:22:57,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:57,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 01:22:57,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:22:57,969 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 21 states. [2020-08-22 01:22:58,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:58,745 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-08-22 01:22:58,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 01:22:58,746 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2020-08-22 01:22:58,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:58,748 INFO L225 Difference]: With dead ends: 72 [2020-08-22 01:22:58,749 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 01:22:58,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 01:22:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 01:22:58,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-08-22 01:22:58,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 01:22:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-08-22 01:22:58,757 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 64 [2020-08-22 01:22:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:58,758 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-08-22 01:22:58,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 01:22:58,758 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-08-22 01:22:58,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 01:22:58,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:58,759 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:58,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:22:58,760 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:58,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:58,765 INFO L82 PathProgramCache]: Analyzing trace with hash 353359300, now seen corresponding path program 4 times [2020-08-22 01:22:58,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:58,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819931415] [2020-08-22 01:22:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:22:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-22 01:22:59,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819931415] [2020-08-22 01:22:59,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:59,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 01:22:59,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176518374] [2020-08-22 01:22:59,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 01:22:59,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:59,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 01:22:59,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:22:59,410 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2020-08-22 01:23:00,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:00,265 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-08-22 01:23:00,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 01:23:00,266 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-22 01:23:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:00,267 INFO L225 Difference]: With dead ends: 78 [2020-08-22 01:23:00,268 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 01:23:00,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=1604, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 01:23:00,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 01:23:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 51. [2020-08-22 01:23:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 01:23:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-08-22 01:23:00,301 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 71 [2020-08-22 01:23:00,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:00,301 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-08-22 01:23:00,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 01:23:00,302 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-08-22 01:23:00,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 01:23:00,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:00,303 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:00,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:23:00,303 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash -165146017, now seen corresponding path program 4 times [2020-08-22 01:23:00,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:00,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673410882] [2020-08-22 01:23:00,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:23:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-08-22 01:23:01,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673410882] [2020-08-22 01:23:01,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:01,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 01:23:01,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469854317] [2020-08-22 01:23:01,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 01:23:01,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:01,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 01:23:01,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:23:01,099 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 25 states. [2020-08-22 01:23:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:02,146 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-08-22 01:23:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 01:23:02,147 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 78 [2020-08-22 01:23:02,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:02,148 INFO L225 Difference]: With dead ends: 84 [2020-08-22 01:23:02,148 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 01:23:02,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 01:23:02,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 01:23:02,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2020-08-22 01:23:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 01:23:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-08-22 01:23:02,165 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 78 [2020-08-22 01:23:02,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:02,166 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-08-22 01:23:02,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 01:23:02,169 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-08-22 01:23:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 01:23:02,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:02,171 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:02,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:23:02,174 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash 462698472, now seen corresponding path program 5 times [2020-08-22 01:23:02,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:02,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826673874] [2020-08-22 01:23:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:23:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-08-22 01:23:02,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826673874] [2020-08-22 01:23:02,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:02,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 01:23:02,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743167217] [2020-08-22 01:23:02,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 01:23:02,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:02,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 01:23:02,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:23:02,995 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 28 states. [2020-08-22 01:23:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:04,221 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-08-22 01:23:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 01:23:04,222 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 85 [2020-08-22 01:23:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:04,223 INFO L225 Difference]: With dead ends: 90 [2020-08-22 01:23:04,223 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 01:23:04,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 01:23:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 01:23:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2020-08-22 01:23:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 01:23:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-08-22 01:23:04,231 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 85 [2020-08-22 01:23:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:04,232 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-08-22 01:23:04,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 01:23:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-08-22 01:23:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 01:23:04,233 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:04,233 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:04,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:23:04,234 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:04,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:04,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1580751489, now seen corresponding path program 5 times [2020-08-22 01:23:04,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:04,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097401608] [2020-08-22 01:23:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:23:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-08-22 01:23:05,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097401608] [2020-08-22 01:23:05,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:05,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 01:23:05,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052575655] [2020-08-22 01:23:05,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 01:23:05,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:05,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 01:23:05,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-22 01:23:05,259 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 29 states. [2020-08-22 01:23:06,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:06,507 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-08-22 01:23:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 01:23:06,508 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2020-08-22 01:23:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:06,509 INFO L225 Difference]: With dead ends: 96 [2020-08-22 01:23:06,510 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 01:23:06,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=2505, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 01:23:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 01:23:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-08-22 01:23:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 01:23:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-08-22 01:23:06,517 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 92 [2020-08-22 01:23:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:06,518 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-08-22 01:23:06,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 01:23:06,518 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-08-22 01:23:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-22 01:23:06,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:06,519 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:06,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:23:06,520 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:06,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:06,520 INFO L82 PathProgramCache]: Analyzing trace with hash 165729164, now seen corresponding path program 6 times [2020-08-22 01:23:06,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:06,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940129464] [2020-08-22 01:23:06,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:23:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-08-22 01:23:07,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940129464] [2020-08-22 01:23:07,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:07,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 01:23:07,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586694967] [2020-08-22 01:23:07,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 01:23:07,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:07,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 01:23:07,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-08-22 01:23:07,661 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 32 states. [2020-08-22 01:23:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:09,192 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-08-22 01:23:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 01:23:09,194 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 99 [2020-08-22 01:23:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:09,196 INFO L225 Difference]: With dead ends: 102 [2020-08-22 01:23:09,196 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 01:23:09,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=166, Invalid=3140, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 01:23:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 01:23:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2020-08-22 01:23:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 01:23:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-08-22 01:23:09,203 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 99 [2020-08-22 01:23:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:09,204 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-08-22 01:23:09,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 01:23:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-08-22 01:23:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 01:23:09,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:09,205 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:09,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:23:09,206 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:09,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:09,206 INFO L82 PathProgramCache]: Analyzing trace with hash -684135393, now seen corresponding path program 6 times [2020-08-22 01:23:09,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:09,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173670597] [2020-08-22 01:23:09,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:23:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-08-22 01:23:10,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173670597] [2020-08-22 01:23:10,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:10,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 01:23:10,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396988813] [2020-08-22 01:23:10,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 01:23:10,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:10,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 01:23:10,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 01:23:10,377 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 33 states. [2020-08-22 01:23:12,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:12,145 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-08-22 01:23:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 01:23:12,146 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 106 [2020-08-22 01:23:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:12,147 INFO L225 Difference]: With dead ends: 108 [2020-08-22 01:23:12,147 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 01:23:12,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=171, Invalid=3369, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 01:23:12,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 01:23:12,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2020-08-22 01:23:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 01:23:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-08-22 01:23:12,164 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 106 [2020-08-22 01:23:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:12,166 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-08-22 01:23:12,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 01:23:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-08-22 01:23:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 01:23:12,169 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:12,169 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:12,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 01:23:12,169 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash -876959568, now seen corresponding path program 7 times [2020-08-22 01:23:12,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:12,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150013706] [2020-08-22 01:23:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:23:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-08-22 01:23:13,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150013706] [2020-08-22 01:23:13,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:13,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 01:23:13,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063150954] [2020-08-22 01:23:13,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 01:23:13,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:13,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 01:23:13,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 01:23:13,849 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 36 states. [2020-08-22 01:23:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:16,100 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-08-22 01:23:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 01:23:16,101 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 113 [2020-08-22 01:23:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:16,103 INFO L225 Difference]: With dead ends: 114 [2020-08-22 01:23:16,103 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 01:23:16,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=190, Invalid=4100, Unknown=0, NotChecked=0, Total=4290 [2020-08-22 01:23:16,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 01:23:16,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 69. [2020-08-22 01:23:16,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 01:23:16,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-08-22 01:23:16,130 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 113 [2020-08-22 01:23:16,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:16,131 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-08-22 01:23:16,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 01:23:16,131 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-08-22 01:23:16,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-22 01:23:16,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:16,134 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:16,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 01:23:16,134 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:16,135 INFO L82 PathProgramCache]: Analyzing trace with hash -307419585, now seen corresponding path program 7 times [2020-08-22 01:23:16,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:16,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800070551] [2020-08-22 01:23:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:23:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-08-22 01:23:17,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800070551] [2020-08-22 01:23:17,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:17,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 01:23:17,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284017920] [2020-08-22 01:23:17,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 01:23:17,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:17,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 01:23:17,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 01:23:17,735 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 37 states. [2020-08-22 01:23:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:20,020 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-08-22 01:23:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 01:23:20,020 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 120 [2020-08-22 01:23:20,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:20,022 INFO L225 Difference]: With dead ends: 120 [2020-08-22 01:23:20,023 INFO L226 Difference]: Without dead ends: 116 [2020-08-22 01:23:20,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=195, Invalid=4361, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 01:23:20,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-22 01:23:20,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-08-22 01:23:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 01:23:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-08-22 01:23:20,031 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 120 [2020-08-22 01:23:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:20,032 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-08-22 01:23:20,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 01:23:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-08-22 01:23:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 01:23:20,033 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:20,033 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:20,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 01:23:20,034 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:20,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:20,034 INFO L82 PathProgramCache]: Analyzing trace with hash -873547948, now seen corresponding path program 8 times [2020-08-22 01:23:20,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:20,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531307746] [2020-08-22 01:23:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:23:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-08-22 01:23:21,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531307746] [2020-08-22 01:23:21,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:21,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 01:23:21,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817900748] [2020-08-22 01:23:21,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 01:23:21,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:21,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 01:23:21,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 01:23:21,664 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 40 states. [2020-08-22 01:23:24,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:24,039 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-08-22 01:23:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 01:23:24,039 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 127 [2020-08-22 01:23:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:24,041 INFO L225 Difference]: With dead ends: 126 [2020-08-22 01:23:24,041 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 01:23:24,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=214, Invalid=5188, Unknown=0, NotChecked=0, Total=5402 [2020-08-22 01:23:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 01:23:24,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-08-22 01:23:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 01:23:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-08-22 01:23:24,048 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 127 [2020-08-22 01:23:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:24,049 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-08-22 01:23:24,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 01:23:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-08-22 01:23:24,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-22 01:23:24,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:24,050 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:24,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 01:23:24,050 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:24,051 INFO L82 PathProgramCache]: Analyzing trace with hash 178099167, now seen corresponding path program 8 times [2020-08-22 01:23:24,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:24,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431450774] [2020-08-22 01:23:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:23:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-08-22 01:23:25,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431450774] [2020-08-22 01:23:25,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:25,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 01:23:25,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136338812] [2020-08-22 01:23:25,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 01:23:25,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:25,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 01:23:25,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 01:23:25,909 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 41 states. [2020-08-22 01:23:28,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:28,608 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-08-22 01:23:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 01:23:28,613 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 134 [2020-08-22 01:23:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:28,615 INFO L225 Difference]: With dead ends: 132 [2020-08-22 01:23:28,615 INFO L226 Difference]: Without dead ends: 128 [2020-08-22 01:23:28,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=219, Invalid=5481, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 01:23:28,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-22 01:23:28,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-08-22 01:23:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 01:23:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-08-22 01:23:28,622 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 134 [2020-08-22 01:23:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:28,623 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-08-22 01:23:28,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 01:23:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-08-22 01:23:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-22 01:23:28,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:28,624 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:28,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 01:23:28,625 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:28,625 INFO L82 PathProgramCache]: Analyzing trace with hash 273809272, now seen corresponding path program 9 times [2020-08-22 01:23:28,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:28,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234683221] [2020-08-22 01:23:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:23:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-08-22 01:23:30,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234683221] [2020-08-22 01:23:30,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:30,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 01:23:30,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67597901] [2020-08-22 01:23:30,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 01:23:30,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:30,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 01:23:30,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 01:23:30,825 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 44 states. [2020-08-22 01:23:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:33,765 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-08-22 01:23:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 01:23:33,768 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 141 [2020-08-22 01:23:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:33,770 INFO L225 Difference]: With dead ends: 138 [2020-08-22 01:23:33,770 INFO L226 Difference]: Without dead ends: 134 [2020-08-22 01:23:33,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=238, Invalid=6404, Unknown=0, NotChecked=0, Total=6642 [2020-08-22 01:23:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-22 01:23:33,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2020-08-22 01:23:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 01:23:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-08-22 01:23:33,778 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 141 [2020-08-22 01:23:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:33,779 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-08-22 01:23:33,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 01:23:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-08-22 01:23:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-22 01:23:33,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:33,780 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:33,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 01:23:33,780 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:33,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1983154945, now seen corresponding path program 9 times [2020-08-22 01:23:33,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:33,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21748542] [2020-08-22 01:23:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:33,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:33,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:23:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:33,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:33,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:33,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:35,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:35,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:35,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:35,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:35,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:35,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-08-22 01:23:36,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21748542] [2020-08-22 01:23:36,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:36,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-22 01:23:36,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296915491] [2020-08-22 01:23:36,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 01:23:36,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:36,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 01:23:36,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 01:23:36,350 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 46 states. [2020-08-22 01:23:39,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:39,855 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-08-22 01:23:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-22 01:23:39,855 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 148 [2020-08-22 01:23:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:39,857 INFO L225 Difference]: With dead ends: 144 [2020-08-22 01:23:39,857 INFO L226 Difference]: Without dead ends: 140 [2020-08-22 01:23:39,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=250, Invalid=7060, Unknown=0, NotChecked=0, Total=7310 [2020-08-22 01:23:39,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-22 01:23:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-08-22 01:23:39,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 01:23:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-08-22 01:23:39,883 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 148 [2020-08-22 01:23:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:39,883 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-08-22 01:23:39,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 01:23:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-08-22 01:23:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-08-22 01:23:39,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:39,894 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:39,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 01:23:39,895 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:39,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:39,895 INFO L82 PathProgramCache]: Analyzing trace with hash -708738788, now seen corresponding path program 10 times [2020-08-22 01:23:39,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:39,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143663235] [2020-08-22 01:23:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:23:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:41,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:41,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:41,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:41,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:41,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:41,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:41,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:42,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:42,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-08-22 01:23:42,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143663235] [2020-08-22 01:23:42,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:42,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 01:23:42,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901557355] [2020-08-22 01:23:42,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 01:23:42,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:42,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 01:23:42,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 01:23:42,548 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 48 states. [2020-08-22 01:23:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:46,270 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2020-08-22 01:23:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-22 01:23:46,271 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 155 [2020-08-22 01:23:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:46,273 INFO L225 Difference]: With dead ends: 150 [2020-08-22 01:23:46,273 INFO L226 Difference]: Without dead ends: 146 [2020-08-22 01:23:46,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=262, Invalid=7748, Unknown=0, NotChecked=0, Total=8010 [2020-08-22 01:23:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-22 01:23:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 87. [2020-08-22 01:23:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 01:23:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-08-22 01:23:46,281 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 155 [2020-08-22 01:23:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:46,282 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-08-22 01:23:46,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 01:23:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-08-22 01:23:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-22 01:23:46,294 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:46,294 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:46,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 01:23:46,298 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:46,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:46,298 INFO L82 PathProgramCache]: Analyzing trace with hash -448788065, now seen corresponding path program 10 times [2020-08-22 01:23:46,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:46,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729178145] [2020-08-22 01:23:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:23:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:47,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:47,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:47,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:47,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:47,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat