/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-simple/id_o100.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:24:54,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:24:54,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:24:54,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:24:54,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:24:54,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:24:54,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:24:54,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:24:54,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:24:54,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:24:54,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:24:54,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:24:54,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:24:54,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:24:54,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:24:54,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:24:54,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:24:54,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:24:54,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:24:54,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:24:54,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:24:54,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:24:54,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:24:54,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:24:54,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 01:24:54,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:24:54,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:24:54,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:24:54,139 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 01:24:54,172 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:24:54,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:24:54,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:24:54,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:24:54,174 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:24:54,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:24:54,174 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:24:54,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:24:54,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:24:54,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:24:54,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:24:54,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:24:54,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:24:54,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:24:54,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:24:54,176 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:24:54,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:24:54,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:24:54,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:24:54,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:24:54,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:24:54,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:24:54,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:24:54,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:24:54,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:24:54,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:24:54,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:24:54,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:24:54,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:24:54,179 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 01:24:54,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:24:54,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:24:54,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:24:54,530 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:24:54,533 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:24:54,534 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o100.c [2020-08-22 01:24:54,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/917231424/aca65f454e1244358575ba53a49fbac7/FLAGb7e4eb001 [2020-08-22 01:24:55,015 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:24:55,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o100.c [2020-08-22 01:24:55,024 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/917231424/aca65f454e1244358575ba53a49fbac7/FLAGb7e4eb001 [2020-08-22 01:24:55,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/917231424/aca65f454e1244358575ba53a49fbac7 [2020-08-22 01:24:55,401 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:24:55,403 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:24:55,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:24:55,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:24:55,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:24:55,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:24:55" (1/1) ... [2020-08-22 01:24:55,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5996aeb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:24:55, skipping insertion in model container [2020-08-22 01:24:55,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:24:55" (1/1) ... [2020-08-22 01:24:55,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:24:55,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:24:55,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:24:55,676 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:24:55,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:24:55,715 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:24:55,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:24:55 WrapperNode [2020-08-22 01:24:55,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:24:55,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:24:55,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:24:55,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:24:55,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:24:55" (1/1) ... [2020-08-22 01:24:55,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:24:55" (1/1) ... [2020-08-22 01:24:55,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:24:55" (1/1) ... [2020-08-22 01:24:55,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:24:55" (1/1) ... [2020-08-22 01:24:55,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:24:55" (1/1) ... [2020-08-22 01:24:55,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:24:55" (1/1) ... [2020-08-22 01:24:55,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:24:55" (1/1) ... [2020-08-22 01:24:55,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:24:55,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:24:55,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:24:55,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:24:55,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:24:55" (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 01:24:55,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:24:55,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:24:55,902 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 01:24:55,903 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:24:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 01:24:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:24:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 01:24:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:24:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:24:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:24:56,065 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:24:56,065 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 01:24:56,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:24:56 BoogieIcfgContainer [2020-08-22 01:24:56,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:24:56,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:24:56,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:24:56,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:24:56,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:24:55" (1/3) ... [2020-08-22 01:24:56,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@862af79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:24:56, skipping insertion in model container [2020-08-22 01:24:56,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:24:55" (2/3) ... [2020-08-22 01:24:56,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@862af79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:24:56, skipping insertion in model container [2020-08-22 01:24:56,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:24:56" (3/3) ... [2020-08-22 01:24:56,080 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o100.c [2020-08-22 01:24:56,090 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:24:56,098 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:24:56,113 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:24:56,145 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:24:56,146 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:24:56,147 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:24:56,147 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:24:56,147 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:24:56,147 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:24:56,147 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:24:56,148 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:24:56,170 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 01:24:56,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 01:24:56,179 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:24:56,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:24:56,181 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:24:56,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:24:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 01:24:56,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:24:56,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079892759] [2020-08-22 01:24:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:24:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:56,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:24:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:56,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:24:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:56,559 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 01:24:56,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079892759] [2020-08-22 01:24:56,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:24:56,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:24:56,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489306505] [2020-08-22 01:24:56,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:24:56,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:24:56,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:24:56,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:24:56,595 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 01:24:56,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:24:56,667 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-22 01:24:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:24:56,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 01:24:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:24:56,681 INFO L225 Difference]: With dead ends: 32 [2020-08-22 01:24:56,681 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 01:24:56,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:24:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 01:24:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 01:24:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 01:24:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 01:24:56,735 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 01:24:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:24:56,736 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 01:24:56,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:24:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 01:24:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 01:24:56,739 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:24:56,739 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:24:56,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:24:56,740 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:24:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:24:56,740 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 01:24:56,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:24:56,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712290933] [2020-08-22 01:24:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:24:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:56,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:24:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:56,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:24:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:56,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 01:24:56,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712290933] [2020-08-22 01:24:56,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:24:56,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 01:24:56,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460065678] [2020-08-22 01:24:56,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:24:56,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:24:56,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:24:56,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:24:56,968 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-22 01:24:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:24:57,026 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 01:24:57,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:24:57,027 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-22 01:24:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:24:57,028 INFO L225 Difference]: With dead ends: 25 [2020-08-22 01:24:57,028 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 01:24:57,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:24:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 01:24:57,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 01:24:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 01:24:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 01:24:57,037 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 01:24:57,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:24:57,038 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 01:24:57,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:24:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 01:24:57,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 01:24:57,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:24:57,040 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:24:57,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:24:57,040 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:24:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:24:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 01:24:57,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:24:57,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958402645] [2020-08-22 01:24:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:24:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:24:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:24:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 01:24:57,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958402645] [2020-08-22 01:24:57,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:24:57,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:24:57,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3653188] [2020-08-22 01:24:57,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:24:57,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:24:57,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:24:57,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:24:57,273 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-22 01:24:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:24:57,318 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 01:24:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:24:57,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-22 01:24:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:24:57,321 INFO L225 Difference]: With dead ends: 28 [2020-08-22 01:24:57,321 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 01:24:57,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:24:57,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 01:24:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 01:24:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 01:24:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 01:24:57,329 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 01:24:57,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:24:57,330 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 01:24:57,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:24:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 01:24:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 01:24:57,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:24:57,332 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:24:57,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:24:57,332 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:24:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:24:57,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 01:24:57,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:24:57,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454397696] [2020-08-22 01:24:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:24:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:24:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:24:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 01:24:57,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454397696] [2020-08-22 01:24:57,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:24:57,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 01:24:57,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372123989] [2020-08-22 01:24:57,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:24:57,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:24:57,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:24:57,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:24:57,752 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-22 01:24:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:24:57,831 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 01:24:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:24:57,832 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-22 01:24:57,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:24:57,833 INFO L225 Difference]: With dead ends: 31 [2020-08-22 01:24:57,833 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 01:24:57,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:24:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 01:24:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 01:24:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 01:24:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 01:24:57,844 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 01:24:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:24:57,845 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 01:24:57,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:24:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 01:24:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 01:24:57,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:24:57,847 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:24:57,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:24:57,847 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:24:57,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:24:57,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 01:24:57,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:24:57,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042480429] [2020-08-22 01:24:57,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:24:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:24:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:24:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:57,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 01:24:58,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042480429] [2020-08-22 01:24:58,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:24:58,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:24:58,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296620804] [2020-08-22 01:24:58,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:24:58,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:24:58,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:24:58,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:24:58,151 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-22 01:24:58,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:24:58,227 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 01:24:58,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:24:58,228 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-22 01:24:58,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:24:58,229 INFO L225 Difference]: With dead ends: 34 [2020-08-22 01:24:58,229 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 01:24:58,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:24:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 01:24:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 01:24:58,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 01:24:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 01:24:58,237 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 01:24:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:24:58,238 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 01:24:58,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:24:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 01:24:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 01:24:58,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:24:58,240 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:24:58,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:24:58,240 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:24:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:24:58,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 01:24:58,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:24:58,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060894139] [2020-08-22 01:24:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:24:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:24:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:24:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 01:24:58,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060894139] [2020-08-22 01:24:58,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:24:58,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 01:24:58,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727344492] [2020-08-22 01:24:58,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:24:58,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:24:58,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:24:58,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:24:58,609 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-22 01:24:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:24:58,714 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 01:24:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:24:58,715 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-22 01:24:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:24:58,716 INFO L225 Difference]: With dead ends: 37 [2020-08-22 01:24:58,717 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 01:24:58,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:24:58,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 01:24:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 01:24:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 01:24:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 01:24:58,724 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 01:24:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:24:58,725 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 01:24:58,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:24:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 01:24:58,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 01:24:58,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:24:58,727 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:24:58,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:24:58,727 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:24:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:24:58,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 01:24:58,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:24:58,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364607042] [2020-08-22 01:24:58,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:24:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:24:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:24:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:58,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:59,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:59,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 01:24:59,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364607042] [2020-08-22 01:24:59,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:24:59,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 01:24:59,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441327162] [2020-08-22 01:24:59,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 01:24:59,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:24:59,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 01:24:59,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:24:59,093 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-22 01:24:59,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:24:59,208 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 01:24:59,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 01:24:59,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-22 01:24:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:24:59,210 INFO L225 Difference]: With dead ends: 40 [2020-08-22 01:24:59,210 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 01:24:59,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:24:59,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 01:24:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 01:24:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 01:24:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 01:24:59,218 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 01:24:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:24:59,218 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 01:24:59,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 01:24:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 01:24:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 01:24:59,219 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:24:59,220 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:24:59,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:24:59,220 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:24:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:24:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 01:24:59,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:24:59,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230556691] [2020-08-22 01:24:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:24:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:59,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:24:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:59,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:24:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:59,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:59,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:59,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:59,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:59,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:59,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:59,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:24:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:24:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 01:24:59,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230556691] [2020-08-22 01:24:59,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:24:59,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 01:24:59,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040656396] [2020-08-22 01:24:59,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 01:24:59,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:24:59,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 01:24:59,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:24:59,786 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-22 01:24:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:24:59,933 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 01:24:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 01:24:59,933 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-22 01:24:59,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:24:59,935 INFO L225 Difference]: With dead ends: 43 [2020-08-22 01:24:59,935 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 01:24:59,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:24:59,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 01:24:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 01:24:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 01:24:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 01:24:59,942 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 01:24:59,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:24:59,943 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 01:24:59,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 01:24:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 01:24:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 01:24:59,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:24:59,945 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:24:59,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:24:59,945 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:24:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:24:59,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 01:24:59,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:24:59,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675559844] [2020-08-22 01:24:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:24:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 01:25:00,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675559844] [2020-08-22 01:25:00,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:00,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 01:25:00,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630559323] [2020-08-22 01:25:00,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 01:25:00,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:00,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 01:25:00,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:25:00,461 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-22 01:25:00,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:00,636 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 01:25:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 01:25:00,636 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-22 01:25:00,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:00,638 INFO L225 Difference]: With dead ends: 46 [2020-08-22 01:25:00,638 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 01:25:00,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:25:00,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 01:25:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 01:25:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 01:25:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 01:25:00,646 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 01:25:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:00,646 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 01:25:00,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 01:25:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 01:25:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 01:25:00,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:00,648 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:00,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:25:00,648 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:00,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 01:25:00,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:00,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052710860] [2020-08-22 01:25:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:00,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:01,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:01,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:01,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:01,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:01,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 01:25:01,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052710860] [2020-08-22 01:25:01,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:01,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 01:25:01,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712656209] [2020-08-22 01:25:01,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 01:25:01,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:01,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 01:25:01,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:25:01,431 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-22 01:25:01,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:01,660 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 01:25:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 01:25:01,661 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-22 01:25:01,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:01,662 INFO L225 Difference]: With dead ends: 49 [2020-08-22 01:25:01,662 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 01:25:01,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:25:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 01:25:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 01:25:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 01:25:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 01:25:01,678 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 01:25:01,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:01,678 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 01:25:01,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 01:25:01,678 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 01:25:01,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 01:25:01,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:01,684 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:01,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:25:01,684 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:01,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:01,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 01:25:01,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:01,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401135765] [2020-08-22 01:25:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:01,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:01,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:01,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:01,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:02,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:02,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:02,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:02,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:02,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:02,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:02,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:02,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 01:25:02,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401135765] [2020-08-22 01:25:02,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:02,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 01:25:02,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306542924] [2020-08-22 01:25:02,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 01:25:02,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:02,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 01:25:02,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:25:02,509 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-08-22 01:25:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:02,781 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 01:25:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 01:25:02,782 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-22 01:25:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:02,783 INFO L225 Difference]: With dead ends: 52 [2020-08-22 01:25:02,783 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 01:25:02,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:25:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 01:25:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 01:25:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 01:25:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 01:25:02,798 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 01:25:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:02,798 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 01:25:02,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 01:25:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 01:25:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 01:25:02,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:02,802 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:02,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:25:02,802 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:02,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:02,803 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-22 01:25:02,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:02,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384965504] [2020-08-22 01:25:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:02,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:02,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:02,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:03,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:03,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:03,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:03,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:03,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:03,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:03,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:03,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:03,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:03,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 01:25:03,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384965504] [2020-08-22 01:25:03,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:03,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 01:25:03,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945639541] [2020-08-22 01:25:03,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 01:25:03,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:03,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 01:25:03,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:25:03,734 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 27 states. [2020-08-22 01:25:04,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:04,051 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 01:25:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 01:25:04,052 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-08-22 01:25:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:04,053 INFO L225 Difference]: With dead ends: 55 [2020-08-22 01:25:04,053 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 01:25:04,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:25:04,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 01:25:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 01:25:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 01:25:04,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 01:25:04,060 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 01:25:04,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:04,061 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 01:25:04,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 01:25:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 01:25:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 01:25:04,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:04,062 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:04,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:25:04,063 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:04,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:04,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-22 01:25:04,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:04,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422737142] [2020-08-22 01:25:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:04,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:04,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:04,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:04,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:04,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:04,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:04,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:04,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:04,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:04,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:04,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:04,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:05,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:05,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 01:25:05,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422737142] [2020-08-22 01:25:05,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:05,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 01:25:05,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948337555] [2020-08-22 01:25:05,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 01:25:05,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:05,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 01:25:05,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-22 01:25:05,240 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2020-08-22 01:25:05,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:05,621 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 01:25:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 01:25:05,622 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2020-08-22 01:25:05,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:05,623 INFO L225 Difference]: With dead ends: 58 [2020-08-22 01:25:05,623 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 01:25:05,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-22 01:25:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 01:25:05,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 01:25:05,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 01:25:05,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 01:25:05,631 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 01:25:05,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:05,631 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 01:25:05,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 01:25:05,632 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 01:25:05,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 01:25:05,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:05,633 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:05,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:25:05,633 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:05,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:05,634 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-22 01:25:05,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:05,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526115527] [2020-08-22 01:25:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:05,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:05,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:05,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:05,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:05,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:05,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:05,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:06,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:06,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:06,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:06,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:06,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:06,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:06,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:06,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 01:25:06,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526115527] [2020-08-22 01:25:06,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:06,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 01:25:06,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336268282] [2020-08-22 01:25:06,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 01:25:06,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:06,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 01:25:06,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-22 01:25:06,719 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 31 states. [2020-08-22 01:25:07,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:07,102 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 01:25:07,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 01:25:07,103 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-08-22 01:25:07,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:07,104 INFO L225 Difference]: With dead ends: 61 [2020-08-22 01:25:07,105 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 01:25:07,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-22 01:25:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 01:25:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 01:25:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 01:25:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 01:25:07,111 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 01:25:07,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:07,112 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 01:25:07,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 01:25:07,112 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 01:25:07,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 01:25:07,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:07,113 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:07,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:25:07,114 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:07,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:07,114 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-22 01:25:07,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:07,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551047600] [2020-08-22 01:25:07,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:07,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 01:25:08,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551047600] [2020-08-22 01:25:08,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:08,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 01:25:08,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320976378] [2020-08-22 01:25:08,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 01:25:08,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:08,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 01:25:08,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 01:25:08,243 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 33 states. [2020-08-22 01:25:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:08,704 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 01:25:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 01:25:08,705 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-08-22 01:25:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:08,706 INFO L225 Difference]: With dead ends: 64 [2020-08-22 01:25:08,706 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 01:25:08,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 01:25:08,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 01:25:08,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 01:25:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 01:25:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 01:25:08,712 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 01:25:08,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:08,713 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 01:25:08,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 01:25:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 01:25:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 01:25:08,714 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:08,714 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:08,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:25:08,714 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:08,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-22 01:25:08,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:08,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420686433] [2020-08-22 01:25:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 01:25:09,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420686433] [2020-08-22 01:25:09,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:09,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 01:25:09,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837779519] [2020-08-22 01:25:09,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 01:25:09,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:09,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 01:25:09,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 01:25:09,874 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-22 01:25:10,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:10,402 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-22 01:25:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 01:25:10,403 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-22 01:25:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:10,406 INFO L225 Difference]: With dead ends: 67 [2020-08-22 01:25:10,406 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 01:25:10,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 01:25:10,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 01:25:10,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 01:25:10,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 01:25:10,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 01:25:10,412 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-22 01:25:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:10,412 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 01:25:10,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 01:25:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 01:25:10,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 01:25:10,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:10,414 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:10,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:25:10,414 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:10,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:10,414 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-22 01:25:10,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:10,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611656712] [2020-08-22 01:25:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 01:25:11,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611656712] [2020-08-22 01:25:11,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:11,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 01:25:11,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66053245] [2020-08-22 01:25:11,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 01:25:11,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:11,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 01:25:11,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 01:25:11,789 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 37 states. [2020-08-22 01:25:12,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:12,429 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-22 01:25:12,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 01:25:12,430 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-08-22 01:25:12,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:12,431 INFO L225 Difference]: With dead ends: 70 [2020-08-22 01:25:12,431 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 01:25:12,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 01:25:12,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 01:25:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-22 01:25:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 01:25:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-22 01:25:12,445 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-22 01:25:12,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:12,445 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-22 01:25:12,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 01:25:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-22 01:25:12,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 01:25:12,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:12,447 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:12,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 01:25:12,447 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:12,449 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-22 01:25:12,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:12,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855847760] [2020-08-22 01:25:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-22 01:25:14,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855847760] [2020-08-22 01:25:14,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:14,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-22 01:25:14,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394890726] [2020-08-22 01:25:14,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 01:25:14,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:14,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 01:25:14,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 01:25:14,018 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 39 states. [2020-08-22 01:25:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:14,759 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-22 01:25:14,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 01:25:14,759 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-08-22 01:25:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:14,760 INFO L225 Difference]: With dead ends: 73 [2020-08-22 01:25:14,760 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 01:25:14,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 01:25:14,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 01:25:14,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-22 01:25:14,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 01:25:14,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-22 01:25:14,766 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-22 01:25:14,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:14,766 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-22 01:25:14,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 01:25:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-22 01:25:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 01:25:14,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:14,768 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:14,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 01:25:14,768 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:14,769 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-22 01:25:14,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:14,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195070337] [2020-08-22 01:25:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-22 01:25:16,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195070337] [2020-08-22 01:25:16,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:16,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 01:25:16,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620677066] [2020-08-22 01:25:16,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 01:25:16,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:16,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 01:25:16,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 01:25:16,639 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2020-08-22 01:25:17,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:17,418 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-22 01:25:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 01:25:17,419 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2020-08-22 01:25:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:17,420 INFO L225 Difference]: With dead ends: 76 [2020-08-22 01:25:17,420 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 01:25:17,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 01:25:17,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 01:25:17,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-22 01:25:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 01:25:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-22 01:25:17,429 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-22 01:25:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:17,430 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-22 01:25:17,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 01:25:17,430 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-22 01:25:17,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 01:25:17,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:17,431 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:17,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 01:25:17,432 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:17,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-22 01:25:17,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:17,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76028814] [2020-08-22 01:25:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-22 01:25:19,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76028814] [2020-08-22 01:25:19,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:19,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-22 01:25:19,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464409251] [2020-08-22 01:25:19,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 01:25:19,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:19,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 01:25:19,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 01:25:19,448 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 43 states. [2020-08-22 01:25:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:20,336 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-22 01:25:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 01:25:20,337 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-08-22 01:25:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:20,338 INFO L225 Difference]: With dead ends: 79 [2020-08-22 01:25:20,339 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 01:25:20,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 01:25:20,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 01:25:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-22 01:25:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 01:25:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-22 01:25:20,345 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-22 01:25:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:20,345 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-22 01:25:20,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 01:25:20,346 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-22 01:25:20,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 01:25:20,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:20,347 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:20,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 01:25:20,347 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:20,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:20,348 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-22 01:25:20,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:20,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465049144] [2020-08-22 01:25:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-22 01:25:22,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465049144] [2020-08-22 01:25:22,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:22,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-22 01:25:22,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417961464] [2020-08-22 01:25:22,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-22 01:25:22,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:22,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-22 01:25:22,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 01:25:22,432 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2020-08-22 01:25:23,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:23,270 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-22 01:25:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 01:25:23,271 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-08-22 01:25:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:23,272 INFO L225 Difference]: With dead ends: 82 [2020-08-22 01:25:23,273 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 01:25:23,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 01:25:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 01:25:23,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-22 01:25:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 01:25:23,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-22 01:25:23,279 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-22 01:25:23,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:23,279 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-22 01:25:23,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-22 01:25:23,279 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-22 01:25:23,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-22 01:25:23,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:23,281 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:23,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 01:25:23,281 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:23,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:23,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-22 01:25:23,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:23,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138364937] [2020-08-22 01:25:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-22 01:25:25,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138364937] [2020-08-22 01:25:25,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:25,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-22 01:25:25,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117902668] [2020-08-22 01:25:25,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-22 01:25:25,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:25,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-22 01:25:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 01:25:25,429 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 47 states. [2020-08-22 01:25:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:26,345 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-22 01:25:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 01:25:26,347 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-08-22 01:25:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:26,349 INFO L225 Difference]: With dead ends: 85 [2020-08-22 01:25:26,349 INFO L226 Difference]: Without dead ends: 81 [2020-08-22 01:25:26,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 01:25:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-22 01:25:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-22 01:25:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 01:25:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-22 01:25:26,354 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-22 01:25:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:26,355 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-22 01:25:26,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-22 01:25:26,355 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-22 01:25:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-22 01:25:26,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:26,357 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:26,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 01:25:26,357 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:26,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-08-22 01:25:26,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:26,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982968495] [2020-08-22 01:25:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:28,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:28,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:28,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:28,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:28,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-22 01:25:28,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982968495] [2020-08-22 01:25:28,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:28,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-22 01:25:28,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59819245] [2020-08-22 01:25:28,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-22 01:25:28,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:28,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-22 01:25:28,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 01:25:28,702 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 49 states. [2020-08-22 01:25:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:29,752 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-22 01:25:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 01:25:29,753 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2020-08-22 01:25:29,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:29,754 INFO L225 Difference]: With dead ends: 88 [2020-08-22 01:25:29,754 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 01:25:29,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 01:25:29,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 01:25:29,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-22 01:25:29,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 01:25:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-22 01:25:29,760 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-22 01:25:29,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:29,761 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-22 01:25:29,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-22 01:25:29,761 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-22 01:25:29,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-22 01:25:29,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:29,763 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:29,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 01:25:29,763 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:29,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:29,764 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-08-22 01:25:29,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:29,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765145229] [2020-08-22 01:25:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:29,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:29,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:29,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:30,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:31,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:32,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:32,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-22 01:25:32,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765145229] [2020-08-22 01:25:32,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:32,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-22 01:25:32,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027308652] [2020-08-22 01:25:32,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-22 01:25:32,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:32,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-22 01:25:32,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 01:25:32,439 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 51 states. [2020-08-22 01:25:33,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:33,563 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-22 01:25:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-22 01:25:33,563 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2020-08-22 01:25:33,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:33,564 INFO L225 Difference]: With dead ends: 91 [2020-08-22 01:25:33,564 INFO L226 Difference]: Without dead ends: 87 [2020-08-22 01:25:33,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 01:25:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-22 01:25:33,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-22 01:25:33,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 01:25:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-22 01:25:33,570 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-22 01:25:33,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:33,571 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-22 01:25:33,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-22 01:25:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-22 01:25:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-22 01:25:33,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:33,573 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:33,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 01:25:33,573 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:33,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:33,574 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-08-22 01:25:33,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:33,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773137812] [2020-08-22 01:25:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:33,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:33,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:33,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:33,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:33,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:33,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:34,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:35,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-22 01:25:36,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773137812] [2020-08-22 01:25:36,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:36,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-22 01:25:36,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839049858] [2020-08-22 01:25:36,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-22 01:25:36,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:36,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-22 01:25:36,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 01:25:36,230 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 53 states. [2020-08-22 01:25:37,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:37,442 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-22 01:25:37,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-22 01:25:37,443 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 157 [2020-08-22 01:25:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:37,445 INFO L225 Difference]: With dead ends: 94 [2020-08-22 01:25:37,445 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 01:25:37,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 01:25:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 01:25:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-22 01:25:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 01:25:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-22 01:25:37,451 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-22 01:25:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:37,451 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-22 01:25:37,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-22 01:25:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-22 01:25:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-22 01:25:37,452 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:37,453 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:37,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 01:25:37,453 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:37,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:37,453 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-08-22 01:25:37,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:37,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533825698] [2020-08-22 01:25:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:37,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:37,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:37,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:37,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:37,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:37,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:37,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:37,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:38,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:38,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:38,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:38,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:38,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:38,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:38,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:38,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:38,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:38,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:39,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:39,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:39,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:39,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:39,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:39,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:39,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:39,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-08-22 01:25:40,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533825698] [2020-08-22 01:25:40,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:40,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-22 01:25:40,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872120513] [2020-08-22 01:25:40,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-22 01:25:40,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:40,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-22 01:25:40,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 01:25:40,332 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-08-22 01:25:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:41,626 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-08-22 01:25:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 01:25:41,627 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-08-22 01:25:41,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:41,629 INFO L225 Difference]: With dead ends: 97 [2020-08-22 01:25:41,629 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 01:25:41,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 01:25:41,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 01:25:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-22 01:25:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 01:25:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-08-22 01:25:41,636 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-08-22 01:25:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:41,636 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-08-22 01:25:41,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-22 01:25:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-08-22 01:25:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-22 01:25:41,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:41,637 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:41,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 01:25:41,638 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:41,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-08-22 01:25:41,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:41,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575303218] [2020-08-22 01:25:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:41,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:42,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:43,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-08-22 01:25:44,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575303218] [2020-08-22 01:25:44,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:44,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-22 01:25:44,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046496527] [2020-08-22 01:25:44,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-22 01:25:44,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:44,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-22 01:25:44,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 01:25:44,723 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 57 states. [2020-08-22 01:25:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:46,231 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-08-22 01:25:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-22 01:25:46,232 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 169 [2020-08-22 01:25:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:46,234 INFO L225 Difference]: With dead ends: 100 [2020-08-22 01:25:46,234 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 01:25:46,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 01:25:46,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 01:25:46,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-08-22 01:25:46,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 01:25:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-08-22 01:25:46,243 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 169 [2020-08-22 01:25:46,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:46,243 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-08-22 01:25:46,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-22 01:25:46,244 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-08-22 01:25:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-22 01:25:46,245 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:46,246 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:46,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 01:25:46,246 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:46,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:46,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1625096943, now seen corresponding path program 27 times [2020-08-22 01:25:46,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:46,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783982370] [2020-08-22 01:25:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-08-22 01:25:49,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783982370] [2020-08-22 01:25:49,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:49,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-08-22 01:25:49,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745193910] [2020-08-22 01:25:49,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-08-22 01:25:49,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:49,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-08-22 01:25:49,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 01:25:49,619 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 59 states. [2020-08-22 01:25:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:51,177 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2020-08-22 01:25:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-22 01:25:51,178 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 175 [2020-08-22 01:25:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:51,179 INFO L225 Difference]: With dead ends: 103 [2020-08-22 01:25:51,179 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 01:25:51,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 01:25:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 01:25:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-08-22 01:25:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 01:25:51,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-08-22 01:25:51,186 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 175 [2020-08-22 01:25:51,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:51,187 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-08-22 01:25:51,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-08-22 01:25:51,187 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-08-22 01:25:51,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-22 01:25:51,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:51,188 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:51,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 01:25:51,189 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:51,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1463833859, now seen corresponding path program 28 times [2020-08-22 01:25:51,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:51,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108452908] [2020-08-22 01:25:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:51,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat