/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 00:17:56,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 00:17:56,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 00:17:56,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 00:17:56,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 00:17:56,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 00:17:56,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 00:17:56,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 00:17:56,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 00:17:56,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 00:17:56,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 00:17:56,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 00:17:56,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 00:17:56,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 00:17:56,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 00:17:56,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 00:17:56,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 00:17:56,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 00:17:56,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 00:17:56,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 00:17:56,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 00:17:56,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 00:17:56,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 00:17:56,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 00:17:56,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 00:17:56,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 00:17:56,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 00:17:56,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 00:17:56,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 00:17:57,013 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 00:17:57,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 00:17:57,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 00:17:57,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 00:17:57,015 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 00:17:57,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 00:17:57,016 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 00:17:57,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 00:17:57,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 00:17:57,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 00:17:57,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 00:17:57,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 00:17:57,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 00:17:57,017 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 00:17:57,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 00:17:57,017 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 00:17:57,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 00:17:57,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 00:17:57,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 00:17:57,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 00:17:57,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 00:17:57,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:17:57,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 00:17:57,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 00:17:57,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 00:17:57,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 00:17:57,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 00:17:57,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 00:17:57,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 00:17:57,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; [2020-08-19 00:17:57,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 00:17:57,343 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 00:17:57,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 00:17:57,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 00:17:57,354 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 00:17:57,355 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-08-19 00:17:57,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f31aef6db/61659892981443cbbb42f6a48e6c65ad/FLAG093503e29 [2020-08-19 00:17:57,862 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 00:17:57,862 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-08-19 00:17:57,870 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f31aef6db/61659892981443cbbb42f6a48e6c65ad/FLAG093503e29 [2020-08-19 00:17:58,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f31aef6db/61659892981443cbbb42f6a48e6c65ad [2020-08-19 00:17:58,293 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 00:17:58,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 00:17:58,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 00:17:58,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 00:17:58,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 00:17:58,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:17:58" (1/1) ... [2020-08-19 00:17:58,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f0f39f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:58, skipping insertion in model container [2020-08-19 00:17:58,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:17:58" (1/1) ... [2020-08-19 00:17:58,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 00:17:58,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 00:17:58,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:17:58,547 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 00:17:58,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:17:58,587 INFO L208 MainTranslator]: Completed translation [2020-08-19 00:17:58,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:58 WrapperNode [2020-08-19 00:17:58,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 00:17:58,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 00:17:58,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 00:17:58,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 00:17:58,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:58" (1/1) ... [2020-08-19 00:17:58,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:58" (1/1) ... [2020-08-19 00:17:58,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:58" (1/1) ... [2020-08-19 00:17:58,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:58" (1/1) ... [2020-08-19 00:17:58,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:58" (1/1) ... [2020-08-19 00:17:58,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:58" (1/1) ... [2020-08-19 00:17:58,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:58" (1/1) ... [2020-08-19 00:17:58,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 00:17:58,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 00:17:58,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 00:17:58,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 00:17:58,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:17:58,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 00:17:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 00:17:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-08-19 00:17:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-08-19 00:17:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 00:17:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 00:17:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 00:17:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-08-19 00:17:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-08-19 00:17:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 00:17:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 00:17:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 00:17:59,027 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 00:17:59,027 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 00:17:59,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:17:59 BoogieIcfgContainer [2020-08-19 00:17:59,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 00:17:59,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 00:17:59,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 00:17:59,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 00:17:59,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 12:17:58" (1/3) ... [2020-08-19 00:17:59,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf14377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:17:59, skipping insertion in model container [2020-08-19 00:17:59,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:58" (2/3) ... [2020-08-19 00:17:59,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf14377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:17:59, skipping insertion in model container [2020-08-19 00:17:59,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:17:59" (3/3) ... [2020-08-19 00:17:59,040 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-08-19 00:17:59,052 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 00:17:59,060 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 00:17:59,076 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 00:17:59,104 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 00:17:59,104 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 00:17:59,105 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 00:17:59,105 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 00:17:59,105 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 00:17:59,105 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 00:17:59,105 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 00:17:59,105 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 00:17:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-19 00:17:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 00:17:59,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:59,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:17:59,154 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:59,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:59,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2122072279, now seen corresponding path program 1 times [2020-08-19 00:17:59,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:59,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427423225] [2020-08-19 00:17:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:59,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:59,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:17:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:17:59,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427423225] [2020-08-19 00:17:59,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:17:59,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 00:17:59,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309103579] [2020-08-19 00:17:59,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 00:17:59,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:59,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 00:17:59,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 00:17:59,579 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-08-19 00:17:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:59,724 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-08-19 00:17:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 00:17:59,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-19 00:17:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:59,739 INFO L225 Difference]: With dead ends: 41 [2020-08-19 00:17:59,740 INFO L226 Difference]: Without dead ends: 27 [2020-08-19 00:17:59,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:17:59,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-19 00:17:59,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-19 00:17:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 00:17:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-19 00:17:59,798 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-08-19 00:17:59,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:59,798 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-19 00:17:59,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 00:17:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-19 00:17:59,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 00:17:59,801 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:59,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:17:59,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 00:17:59,802 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:59,803 INFO L82 PathProgramCache]: Analyzing trace with hash -612070348, now seen corresponding path program 1 times [2020-08-19 00:17:59,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:59,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962437575] [2020-08-19 00:17:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:59,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:59,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:17:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:18:00,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962437575] [2020-08-19 00:18:00,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:18:00,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 00:18:00,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995545735] [2020-08-19 00:18:00,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 00:18:00,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:00,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 00:18:00,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:18:00,019 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-08-19 00:18:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:00,133 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-19 00:18:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 00:18:00,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-08-19 00:18:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:00,135 INFO L225 Difference]: With dead ends: 33 [2020-08-19 00:18:00,135 INFO L226 Difference]: Without dead ends: 29 [2020-08-19 00:18:00,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:18:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-19 00:18:00,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-19 00:18:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 00:18:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-19 00:18:00,145 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2020-08-19 00:18:00,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:00,146 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-19 00:18:00,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 00:18:00,146 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-19 00:18:00,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 00:18:00,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:00,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:00,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 00:18:00,148 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:00,149 INFO L82 PathProgramCache]: Analyzing trace with hash -592576498, now seen corresponding path program 1 times [2020-08-19 00:18:00,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:00,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927501304] [2020-08-19 00:18:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:18:00,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927501304] [2020-08-19 00:18:00,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:18:00,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 00:18:00,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515657942] [2020-08-19 00:18:00,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 00:18:00,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:00,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 00:18:00,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 00:18:00,238 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-08-19 00:18:00,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:00,293 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-08-19 00:18:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 00:18:00,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-19 00:18:00,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:00,306 INFO L225 Difference]: With dead ends: 41 [2020-08-19 00:18:00,307 INFO L226 Difference]: Without dead ends: 29 [2020-08-19 00:18:00,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 00:18:00,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-19 00:18:00,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-19 00:18:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 00:18:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-19 00:18:00,318 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-08-19 00:18:00,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:00,320 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-19 00:18:00,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 00:18:00,320 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-19 00:18:00,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 00:18:00,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:00,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:00,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 00:18:00,324 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:00,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:00,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1306118367, now seen corresponding path program 1 times [2020-08-19 00:18:00,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:00,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512906915] [2020-08-19 00:18:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:18:00,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512906915] [2020-08-19 00:18:00,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:18:00,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-19 00:18:00,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505674742] [2020-08-19 00:18:00,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:18:00,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:00,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:18:00,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:18:00,556 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2020-08-19 00:18:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:00,714 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-08-19 00:18:00,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 00:18:00,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-08-19 00:18:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:00,716 INFO L225 Difference]: With dead ends: 36 [2020-08-19 00:18:00,716 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 00:18:00,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:18:00,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 00:18:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 00:18:00,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 00:18:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-19 00:18:00,724 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-08-19 00:18:00,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:00,725 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-19 00:18:00,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:18:00,725 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-19 00:18:00,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 00:18:00,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:00,727 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:00,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 00:18:00,727 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:00,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:00,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1571291849, now seen corresponding path program 1 times [2020-08-19 00:18:00,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:00,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829331688] [2020-08-19 00:18:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 00:18:00,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829331688] [2020-08-19 00:18:00,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:18:00,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 00:18:00,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224936095] [2020-08-19 00:18:00,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 00:18:00,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:00,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 00:18:00,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 00:18:00,799 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-08-19 00:18:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:00,848 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-08-19 00:18:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 00:18:00,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-19 00:18:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:00,850 INFO L225 Difference]: With dead ends: 42 [2020-08-19 00:18:00,850 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 00:18:00,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 00:18:00,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 00:18:00,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 00:18:00,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 00:18:00,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-19 00:18:00,858 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-08-19 00:18:00,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:00,858 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-19 00:18:00,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 00:18:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-19 00:18:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 00:18:00,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:00,860 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:00,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 00:18:00,861 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:00,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1610221656, now seen corresponding path program 1 times [2020-08-19 00:18:00,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:00,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151531848] [2020-08-19 00:18:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-19 00:18:01,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151531848] [2020-08-19 00:18:01,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:01,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 00:18:01,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648059910] [2020-08-19 00:18:01,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 00:18:01,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:01,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 00:18:01,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:18:01,146 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2020-08-19 00:18:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:01,402 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-08-19 00:18:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 00:18:01,403 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-08-19 00:18:01,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:01,412 INFO L225 Difference]: With dead ends: 42 [2020-08-19 00:18:01,412 INFO L226 Difference]: Without dead ends: 38 [2020-08-19 00:18:01,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-08-19 00:18:01,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-19 00:18:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-08-19 00:18:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 00:18:01,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-19 00:18:01,420 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2020-08-19 00:18:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:01,420 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-19 00:18:01,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 00:18:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-19 00:18:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-19 00:18:01,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:01,422 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:01,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 00:18:01,422 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:01,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:01,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1417612799, now seen corresponding path program 1 times [2020-08-19 00:18:01,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:01,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146720525] [2020-08-19 00:18:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 00:18:01,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146720525] [2020-08-19 00:18:01,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:01,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 00:18:01,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622518300] [2020-08-19 00:18:01,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 00:18:01,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:01,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 00:18:01,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-08-19 00:18:01,716 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 14 states. [2020-08-19 00:18:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:02,003 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-19 00:18:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 00:18:02,003 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-08-19 00:18:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:02,005 INFO L225 Difference]: With dead ends: 48 [2020-08-19 00:18:02,005 INFO L226 Difference]: Without dead ends: 44 [2020-08-19 00:18:02,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-08-19 00:18:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-19 00:18:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-08-19 00:18:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 00:18:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-19 00:18:02,012 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 36 [2020-08-19 00:18:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:02,013 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-19 00:18:02,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 00:18:02,013 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-19 00:18:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 00:18:02,014 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:02,014 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:02,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 00:18:02,015 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:02,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1668529660, now seen corresponding path program 2 times [2020-08-19 00:18:02,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:02,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012959162] [2020-08-19 00:18:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-19 00:18:02,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012959162] [2020-08-19 00:18:02,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:02,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 00:18:02,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792733829] [2020-08-19 00:18:02,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 00:18:02,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:02,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 00:18:02,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-19 00:18:02,361 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 16 states. [2020-08-19 00:18:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:02,740 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-08-19 00:18:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 00:18:02,741 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-08-19 00:18:02,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:02,743 INFO L225 Difference]: With dead ends: 54 [2020-08-19 00:18:02,743 INFO L226 Difference]: Without dead ends: 50 [2020-08-19 00:18:02,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-08-19 00:18:02,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-19 00:18:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-08-19 00:18:02,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 00:18:02,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-19 00:18:02,760 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2020-08-19 00:18:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:02,761 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-19 00:18:02,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 00:18:02,761 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-19 00:18:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-19 00:18:02,769 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:02,769 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:02,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 00:18:02,769 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:02,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:02,770 INFO L82 PathProgramCache]: Analyzing trace with hash -150927713, now seen corresponding path program 2 times [2020-08-19 00:18:02,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:02,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792854507] [2020-08-19 00:18:02,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-08-19 00:18:03,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792854507] [2020-08-19 00:18:03,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:03,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 00:18:03,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515800523] [2020-08-19 00:18:03,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 00:18:03,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:03,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 00:18:03,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-08-19 00:18:03,223 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 18 states. [2020-08-19 00:18:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:03,703 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-08-19 00:18:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 00:18:03,703 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-19 00:18:03,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:03,705 INFO L225 Difference]: With dead ends: 60 [2020-08-19 00:18:03,705 INFO L226 Difference]: Without dead ends: 56 [2020-08-19 00:18:03,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2020-08-19 00:18:03,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-19 00:18:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-08-19 00:18:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 00:18:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-19 00:18:03,713 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 50 [2020-08-19 00:18:03,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:03,713 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-19 00:18:03,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 00:18:03,714 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-19 00:18:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 00:18:03,715 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:03,715 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:03,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 00:18:03,716 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:03,716 INFO L82 PathProgramCache]: Analyzing trace with hash -308892384, now seen corresponding path program 3 times [2020-08-19 00:18:03,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:03,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375759647] [2020-08-19 00:18:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-19 00:18:04,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375759647] [2020-08-19 00:18:04,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:04,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 00:18:04,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275642924] [2020-08-19 00:18:04,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 00:18:04,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:04,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 00:18:04,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-08-19 00:18:04,225 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2020-08-19 00:18:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:04,816 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-08-19 00:18:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 00:18:04,817 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-08-19 00:18:04,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:04,820 INFO L225 Difference]: With dead ends: 66 [2020-08-19 00:18:04,820 INFO L226 Difference]: Without dead ends: 62 [2020-08-19 00:18:04,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 00:18:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-19 00:18:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-08-19 00:18:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 00:18:04,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-08-19 00:18:04,838 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 57 [2020-08-19 00:18:04,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:04,839 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-08-19 00:18:04,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 00:18:04,839 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-08-19 00:18:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-19 00:18:04,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:04,840 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:04,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 00:18:04,841 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:04,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1668346559, now seen corresponding path program 3 times [2020-08-19 00:18:04,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:04,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104786741] [2020-08-19 00:18:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-19 00:18:05,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104786741] [2020-08-19 00:18:05,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:05,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 00:18:05,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838198945] [2020-08-19 00:18:05,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 00:18:05,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:05,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 00:18:05,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-19 00:18:05,312 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 21 states. [2020-08-19 00:18:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:05,999 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-08-19 00:18:05,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 00:18:06,000 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2020-08-19 00:18:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:06,002 INFO L225 Difference]: With dead ends: 72 [2020-08-19 00:18:06,002 INFO L226 Difference]: Without dead ends: 68 [2020-08-19 00:18:06,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2020-08-19 00:18:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-19 00:18:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-08-19 00:18:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 00:18:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-08-19 00:18:06,011 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 64 [2020-08-19 00:18:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:06,011 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-08-19 00:18:06,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 00:18:06,011 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-08-19 00:18:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-19 00:18:06,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:06,013 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:06,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 00:18:06,013 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:06,014 INFO L82 PathProgramCache]: Analyzing trace with hash 353359300, now seen corresponding path program 4 times [2020-08-19 00:18:06,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:06,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483635329] [2020-08-19 00:18:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-19 00:18:06,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483635329] [2020-08-19 00:18:06,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:06,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 00:18:06,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780733490] [2020-08-19 00:18:06,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 00:18:06,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:06,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 00:18:06,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-08-19 00:18:06,656 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2020-08-19 00:18:07,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:07,521 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-08-19 00:18:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 00:18:07,521 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-19 00:18:07,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:07,522 INFO L225 Difference]: With dead ends: 78 [2020-08-19 00:18:07,523 INFO L226 Difference]: Without dead ends: 74 [2020-08-19 00:18:07,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=1604, Unknown=0, NotChecked=0, Total=1722 [2020-08-19 00:18:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-19 00:18:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 51. [2020-08-19 00:18:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 00:18:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-08-19 00:18:07,531 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 71 [2020-08-19 00:18:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:07,532 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-08-19 00:18:07,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 00:18:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-08-19 00:18:07,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 00:18:07,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:07,533 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:07,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 00:18:07,533 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:07,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:07,534 INFO L82 PathProgramCache]: Analyzing trace with hash -165146017, now seen corresponding path program 4 times [2020-08-19 00:18:07,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:07,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55718368] [2020-08-19 00:18:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:08,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:08,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:08,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-08-19 00:18:08,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55718368] [2020-08-19 00:18:08,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:08,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 00:18:08,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482868755] [2020-08-19 00:18:08,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 00:18:08,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:08,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 00:18:08,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-19 00:18:08,269 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 25 states. [2020-08-19 00:18:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:09,199 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-08-19 00:18:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 00:18:09,200 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 78 [2020-08-19 00:18:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:09,201 INFO L225 Difference]: With dead ends: 84 [2020-08-19 00:18:09,202 INFO L226 Difference]: Without dead ends: 80 [2020-08-19 00:18:09,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2020-08-19 00:18:09,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-19 00:18:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2020-08-19 00:18:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 00:18:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-08-19 00:18:09,210 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 78 [2020-08-19 00:18:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:09,211 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-08-19 00:18:09,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 00:18:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-08-19 00:18:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-19 00:18:09,212 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:09,212 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:09,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 00:18:09,213 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:09,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:09,213 INFO L82 PathProgramCache]: Analyzing trace with hash 462698472, now seen corresponding path program 5 times [2020-08-19 00:18:09,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:09,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328123983] [2020-08-19 00:18:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-08-19 00:18:10,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328123983] [2020-08-19 00:18:10,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:10,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-19 00:18:10,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686756214] [2020-08-19 00:18:10,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-19 00:18:10,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:10,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-19 00:18:10,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-08-19 00:18:10,048 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 28 states. [2020-08-19 00:18:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:11,130 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-08-19 00:18:11,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 00:18:11,131 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 85 [2020-08-19 00:18:11,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:11,133 INFO L225 Difference]: With dead ends: 90 [2020-08-19 00:18:11,133 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 00:18:11,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2020-08-19 00:18:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 00:18:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2020-08-19 00:18:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 00:18:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-08-19 00:18:11,141 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 85 [2020-08-19 00:18:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:11,141 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-08-19 00:18:11,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-19 00:18:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-08-19 00:18:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-19 00:18:11,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:11,143 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:11,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 00:18:11,143 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:11,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1580751489, now seen corresponding path program 5 times [2020-08-19 00:18:11,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:11,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077348493] [2020-08-19 00:18:11,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-08-19 00:18:12,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077348493] [2020-08-19 00:18:12,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:12,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-19 00:18:12,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678811310] [2020-08-19 00:18:12,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-19 00:18:12,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:12,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-19 00:18:12,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-19 00:18:12,040 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 29 states. [2020-08-19 00:18:13,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:13,382 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-08-19 00:18:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-19 00:18:13,382 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2020-08-19 00:18:13,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:13,383 INFO L225 Difference]: With dead ends: 96 [2020-08-19 00:18:13,384 INFO L226 Difference]: Without dead ends: 92 [2020-08-19 00:18:13,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=2505, Unknown=0, NotChecked=0, Total=2652 [2020-08-19 00:18:13,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-19 00:18:13,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-08-19 00:18:13,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-19 00:18:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-08-19 00:18:13,392 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 92 [2020-08-19 00:18:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:13,392 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-08-19 00:18:13,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-19 00:18:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-08-19 00:18:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-19 00:18:13,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:13,394 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:13,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 00:18:13,394 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:13,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:13,395 INFO L82 PathProgramCache]: Analyzing trace with hash 165729164, now seen corresponding path program 6 times [2020-08-19 00:18:13,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:13,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372335135] [2020-08-19 00:18:13,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:14,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:14,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:14,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:14,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:14,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-08-19 00:18:14,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372335135] [2020-08-19 00:18:14,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:14,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-19 00:18:14,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521888248] [2020-08-19 00:18:14,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-19 00:18:14,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:14,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-19 00:18:14,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-08-19 00:18:14,487 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 32 states. [2020-08-19 00:18:15,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:15,947 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-08-19 00:18:15,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 00:18:15,948 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 99 [2020-08-19 00:18:15,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:15,950 INFO L225 Difference]: With dead ends: 102 [2020-08-19 00:18:15,950 INFO L226 Difference]: Without dead ends: 98 [2020-08-19 00:18:15,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=166, Invalid=3140, Unknown=0, NotChecked=0, Total=3306 [2020-08-19 00:18:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-19 00:18:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2020-08-19 00:18:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 00:18:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-08-19 00:18:15,958 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 99 [2020-08-19 00:18:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:15,959 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-08-19 00:18:15,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-19 00:18:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-08-19 00:18:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-19 00:18:15,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:15,960 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:15,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 00:18:15,961 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:15,961 INFO L82 PathProgramCache]: Analyzing trace with hash -684135393, now seen corresponding path program 6 times [2020-08-19 00:18:15,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:15,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035991632] [2020-08-19 00:18:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-08-19 00:18:17,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035991632] [2020-08-19 00:18:17,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:17,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-19 00:18:17,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452501525] [2020-08-19 00:18:17,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-19 00:18:17,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:17,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-19 00:18:17,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 00:18:17,116 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 33 states. [2020-08-19 00:18:18,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:18,839 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-08-19 00:18:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-19 00:18:18,840 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 106 [2020-08-19 00:18:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:18,842 INFO L225 Difference]: With dead ends: 108 [2020-08-19 00:18:18,842 INFO L226 Difference]: Without dead ends: 104 [2020-08-19 00:18:18,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=171, Invalid=3369, Unknown=0, NotChecked=0, Total=3540 [2020-08-19 00:18:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-19 00:18:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2020-08-19 00:18:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-19 00:18:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-08-19 00:18:18,863 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 106 [2020-08-19 00:18:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:18,863 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-08-19 00:18:18,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-19 00:18:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-08-19 00:18:18,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-19 00:18:18,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:18,868 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:18,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 00:18:18,868 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:18,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:18,869 INFO L82 PathProgramCache]: Analyzing trace with hash -876959568, now seen corresponding path program 7 times [2020-08-19 00:18:18,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:18,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226126849] [2020-08-19 00:18:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:18,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:18,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:20,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-08-19 00:18:20,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226126849] [2020-08-19 00:18:20,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:20,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-19 00:18:20,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065031548] [2020-08-19 00:18:20,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-19 00:18:20,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:20,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-19 00:18:20,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-08-19 00:18:20,185 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 36 states. [2020-08-19 00:18:22,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:22,130 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-08-19 00:18:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-19 00:18:22,131 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 113 [2020-08-19 00:18:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:22,133 INFO L225 Difference]: With dead ends: 114 [2020-08-19 00:18:22,133 INFO L226 Difference]: Without dead ends: 110 [2020-08-19 00:18:22,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=190, Invalid=4100, Unknown=0, NotChecked=0, Total=4290 [2020-08-19 00:18:22,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-19 00:18:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 69. [2020-08-19 00:18:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-19 00:18:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-08-19 00:18:22,145 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 113 [2020-08-19 00:18:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:22,145 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-08-19 00:18:22,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-19 00:18:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-08-19 00:18:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-19 00:18:22,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:22,146 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:22,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 00:18:22,147 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:22,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:22,147 INFO L82 PathProgramCache]: Analyzing trace with hash -307419585, now seen corresponding path program 7 times [2020-08-19 00:18:22,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:22,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975312543] [2020-08-19 00:18:22,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:23,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:23,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:23,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:23,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:23,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:23,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:23,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-08-19 00:18:23,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975312543] [2020-08-19 00:18:23,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:23,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-19 00:18:23,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860711345] [2020-08-19 00:18:23,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-19 00:18:23,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:23,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-19 00:18:23,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-19 00:18:23,838 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 37 states. [2020-08-19 00:18:25,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:25,961 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-08-19 00:18:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-19 00:18:25,962 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 120 [2020-08-19 00:18:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:25,964 INFO L225 Difference]: With dead ends: 120 [2020-08-19 00:18:25,964 INFO L226 Difference]: Without dead ends: 116 [2020-08-19 00:18:25,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=195, Invalid=4361, Unknown=0, NotChecked=0, Total=4556 [2020-08-19 00:18:25,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-19 00:18:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-08-19 00:18:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-19 00:18:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-08-19 00:18:25,972 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 120 [2020-08-19 00:18:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:25,973 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-08-19 00:18:25,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-19 00:18:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-08-19 00:18:25,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-19 00:18:25,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:25,974 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:25,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 00:18:25,974 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:25,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:25,975 INFO L82 PathProgramCache]: Analyzing trace with hash -873547948, now seen corresponding path program 8 times [2020-08-19 00:18:25,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:25,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016775540] [2020-08-19 00:18:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:26,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:26,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:26,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:26,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:26,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:26,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:26,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:26,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:26,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:26,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:26,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:26,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:26,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:27,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:27,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:27,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:27,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:27,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-08-19 00:18:27,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016775540] [2020-08-19 00:18:27,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:27,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-19 00:18:27,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641078130] [2020-08-19 00:18:27,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-19 00:18:27,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:27,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-19 00:18:27,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2020-08-19 00:18:27,668 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 40 states. [2020-08-19 00:18:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:30,005 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-08-19 00:18:30,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-19 00:18:30,005 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 127 [2020-08-19 00:18:30,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:30,006 INFO L225 Difference]: With dead ends: 126 [2020-08-19 00:18:30,006 INFO L226 Difference]: Without dead ends: 122 [2020-08-19 00:18:30,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=214, Invalid=5188, Unknown=0, NotChecked=0, Total=5402 [2020-08-19 00:18:30,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-19 00:18:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-08-19 00:18:30,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-19 00:18:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-08-19 00:18:30,014 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 127 [2020-08-19 00:18:30,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:30,014 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-08-19 00:18:30,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-19 00:18:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-08-19 00:18:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-19 00:18:30,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:30,016 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:30,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 00:18:30,016 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:30,016 INFO L82 PathProgramCache]: Analyzing trace with hash 178099167, now seen corresponding path program 8 times [2020-08-19 00:18:30,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:30,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656056647] [2020-08-19 00:18:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-08-19 00:18:31,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656056647] [2020-08-19 00:18:31,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:31,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-19 00:18:31,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440950482] [2020-08-19 00:18:31,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-19 00:18:31,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:31,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-19 00:18:31,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-19 00:18:31,710 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 41 states. [2020-08-19 00:18:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:34,306 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-08-19 00:18:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-19 00:18:34,307 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 134 [2020-08-19 00:18:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:34,309 INFO L225 Difference]: With dead ends: 132 [2020-08-19 00:18:34,310 INFO L226 Difference]: Without dead ends: 128 [2020-08-19 00:18:34,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=219, Invalid=5481, Unknown=0, NotChecked=0, Total=5700 [2020-08-19 00:18:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-19 00:18:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-08-19 00:18:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-19 00:18:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-08-19 00:18:34,318 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 134 [2020-08-19 00:18:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:34,319 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-08-19 00:18:34,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-19 00:18:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-08-19 00:18:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-19 00:18:34,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:34,320 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:34,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 00:18:34,321 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:34,321 INFO L82 PathProgramCache]: Analyzing trace with hash 273809272, now seen corresponding path program 9 times [2020-08-19 00:18:34,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:34,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666092412] [2020-08-19 00:18:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:35,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:35,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:35,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:35,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:35,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:35,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:35,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:35,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:35,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:36,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:36,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-08-19 00:18:36,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666092412] [2020-08-19 00:18:36,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:36,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-19 00:18:36,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143706214] [2020-08-19 00:18:36,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-19 00:18:36,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:36,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-19 00:18:36,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2020-08-19 00:18:36,491 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 44 states. [2020-08-19 00:18:39,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:39,429 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-08-19 00:18:39,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-19 00:18:39,432 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 141 [2020-08-19 00:18:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:39,434 INFO L225 Difference]: With dead ends: 138 [2020-08-19 00:18:39,434 INFO L226 Difference]: Without dead ends: 134 [2020-08-19 00:18:39,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=238, Invalid=6404, Unknown=0, NotChecked=0, Total=6642 [2020-08-19 00:18:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-19 00:18:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2020-08-19 00:18:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-19 00:18:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-08-19 00:18:39,442 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 141 [2020-08-19 00:18:39,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:39,443 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-08-19 00:18:39,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-19 00:18:39,443 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-08-19 00:18:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-19 00:18:39,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:39,444 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:39,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 00:18:39,445 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:39,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:39,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1983154945, now seen corresponding path program 9 times [2020-08-19 00:18:39,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:39,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293555316] [2020-08-19 00:18:39,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:39,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:39,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:39,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:39,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:39,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:39,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:39,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:39,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:40,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:40,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:40,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:40,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:40,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:40,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:40,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:40,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:40,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:40,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:41,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:41,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:41,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-08-19 00:18:41,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293555316] [2020-08-19 00:18:41,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:41,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-19 00:18:41,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621155580] [2020-08-19 00:18:41,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-19 00:18:41,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:41,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-19 00:18:41,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2020-08-19 00:18:41,820 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 46 states. [2020-08-19 00:18:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:45,023 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-08-19 00:18:45,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-19 00:18:45,024 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 148 [2020-08-19 00:18:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:45,025 INFO L225 Difference]: With dead ends: 144 [2020-08-19 00:18:45,026 INFO L226 Difference]: Without dead ends: 140 [2020-08-19 00:18:45,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=250, Invalid=7060, Unknown=0, NotChecked=0, Total=7310 [2020-08-19 00:18:45,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-19 00:18:45,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-08-19 00:18:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-19 00:18:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-08-19 00:18:45,033 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 148 [2020-08-19 00:18:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:45,034 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-08-19 00:18:45,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-19 00:18:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-08-19 00:18:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-08-19 00:18:45,035 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:45,035 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:45,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 00:18:45,036 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:45,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:45,036 INFO L82 PathProgramCache]: Analyzing trace with hash -708738788, now seen corresponding path program 10 times [2020-08-19 00:18:45,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:45,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970192220] [2020-08-19 00:18:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:45,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:45,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:45,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:45,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:45,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:45,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:45,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:45,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:45,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:45,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:45,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:46,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:46,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:46,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:46,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:46,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:46,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:46,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:46,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:47,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:47,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:47,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-08-19 00:18:47,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970192220] [2020-08-19 00:18:47,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:47,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-19 00:18:47,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960283088] [2020-08-19 00:18:47,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-19 00:18:47,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:47,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-19 00:18:47,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2020-08-19 00:18:47,558 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 48 states. [2020-08-19 00:18:51,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:51,088 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2020-08-19 00:18:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-19 00:18:51,088 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 155 [2020-08-19 00:18:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:51,090 INFO L225 Difference]: With dead ends: 150 [2020-08-19 00:18:51,090 INFO L226 Difference]: Without dead ends: 146 [2020-08-19 00:18:51,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=262, Invalid=7748, Unknown=0, NotChecked=0, Total=8010 [2020-08-19 00:18:51,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-19 00:18:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 87. [2020-08-19 00:18:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-19 00:18:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-08-19 00:18:51,097 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 155 [2020-08-19 00:18:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:51,097 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-08-19 00:18:51,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-19 00:18:51,097 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-08-19 00:18:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-19 00:18:51,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:51,098 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:18:51,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 00:18:51,099 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:51,099 INFO L82 PathProgramCache]: Analyzing trace with hash -448788065, now seen corresponding path program 10 times [2020-08-19 00:18:51,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:51,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170623764] [2020-08-19 00:18:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:51,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:51,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:18:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:51,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:51,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:51,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:51,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:51,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:51,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:51,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:51,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:51,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:52,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:52,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:52,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:52,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:52,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:52,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:52,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:52,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:52,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:53,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:53,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:53,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 00:18:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-08-19 00:18:53,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170623764] [2020-08-19 00:18:53,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:53,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-19 00:18:53,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242798768] [2020-08-19 00:18:53,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-19 00:18:53,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:53,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-19 00:18:53,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-19 00:18:53,710 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 49 states.