/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_25x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:31:57,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:31:57,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:31:57,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:31:57,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:31:57,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:31:57,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:31:57,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:31:57,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:31:57,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:31:57,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:31:57,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:31:57,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:31:57,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:31:57,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:31:57,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:31:57,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:31:57,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:31:57,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:31:57,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:31:57,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:31:57,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:31:57,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:31:57,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:31:57,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:31:57,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:31:57,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:31:57,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:31:57,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:31:57,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 16:31:57,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:31:57,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:31:57,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:31:57,978 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 16:31:58,019 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:31:58,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:31:58,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:31:58,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:31:58,022 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:31:58,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:31:58,023 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:31:58,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:31:58,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:31:58,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:31:58,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:31:58,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:31:58,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:31:58,025 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:31:58,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:31:58,026 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:31:58,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:31:58,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:31:58,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:31:58,027 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:31:58,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:31:58,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:31:58,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:31:58,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:31:58,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:31:58,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:31:58,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:31:58,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:31:58,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:31:58,028 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:31:58,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:31:58,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:31:58,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:31:58,427 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:31:58,427 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:31:58,428 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_25x0-2.c [2020-08-21 16:31:58,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bbd4805a/8a8b93cadeb64dfc89d8619f5a0c091f/FLAGa919eb325 [2020-08-21 16:31:58,932 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:31:58,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_25x0-2.c [2020-08-21 16:31:58,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bbd4805a/8a8b93cadeb64dfc89d8619f5a0c091f/FLAGa919eb325 [2020-08-21 16:31:59,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bbd4805a/8a8b93cadeb64dfc89d8619f5a0c091f [2020-08-21 16:31:59,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:31:59,340 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:31:59,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:31:59,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:31:59,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:31:59,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:31:59" (1/1) ... [2020-08-21 16:31:59,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e6ef35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:59, skipping insertion in model container [2020-08-21 16:31:59,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:31:59" (1/1) ... [2020-08-21 16:31:59,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:31:59,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:31:59,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:31:59,564 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:31:59,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:31:59,591 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:31:59,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:59 WrapperNode [2020-08-21 16:31:59,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:31:59,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:31:59,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:31:59,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:31:59,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:59" (1/1) ... [2020-08-21 16:31:59,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:59" (1/1) ... [2020-08-21 16:31:59,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:59" (1/1) ... [2020-08-21 16:31:59,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:59" (1/1) ... [2020-08-21 16:31:59,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:59" (1/1) ... [2020-08-21 16:31:59,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:59" (1/1) ... [2020-08-21 16:31:59,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:59" (1/1) ... [2020-08-21 16:31:59,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:31:59,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:31:59,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:31:59,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:31:59,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:31:59,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:31:59,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:31:59,772 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-21 16:31:59,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:31:59,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:31:59,773 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-21 16:31:59,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:31:59,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:31:59,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:31:59,952 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:31:59,952 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 16:31:59,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:31:59 BoogieIcfgContainer [2020-08-21 16:31:59,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:31:59,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:31:59,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:31:59,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:31:59,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:31:59" (1/3) ... [2020-08-21 16:31:59,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e663c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:31:59, skipping insertion in model container [2020-08-21 16:31:59,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:59" (2/3) ... [2020-08-21 16:31:59,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e663c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:31:59, skipping insertion in model container [2020-08-21 16:31:59,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:31:59" (3/3) ... [2020-08-21 16:31:59,991 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_25x0-2.c [2020-08-21 16:32:00,020 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:32:00,035 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:32:00,052 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:32:00,085 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:32:00,086 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:32:00,086 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:32:00,086 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:32:00,086 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:32:00,086 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:32:00,086 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:32:00,087 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:32:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 16:32:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 16:32:00,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:00,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:00,109 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:00,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:00,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-21 16:32:00,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:00,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297094543] [2020-08-21 16:32:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:00,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297094543] [2020-08-21 16:32:00,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:00,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:32:00,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911236213] [2020-08-21 16:32:00,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:32:00,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:00,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:32:00,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:32:00,402 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 16:32:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:00,498 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 16:32:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:32:00,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 16:32:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:00,511 INFO L225 Difference]: With dead ends: 30 [2020-08-21 16:32:00,512 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 16:32:00,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:32:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 16:32:00,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 16:32:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 16:32:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 16:32:00,555 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 16:32:00,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:00,556 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 16:32:00,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:32:00,556 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 16:32:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 16:32:00,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:00,558 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:00,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:32:00,559 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:00,560 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-21 16:32:00,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:00,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761322979] [2020-08-21 16:32:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 16:32:00,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761322979] [2020-08-21 16:32:00,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:00,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 16:32:00,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549582752] [2020-08-21 16:32:00,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 16:32:00,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:00,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 16:32:00,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:32:00,688 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 16:32:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:00,746 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 16:32:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:32:00,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 16:32:00,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:00,748 INFO L225 Difference]: With dead ends: 25 [2020-08-21 16:32:00,748 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 16:32:00,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:32:00,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 16:32:00,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 16:32:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 16:32:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 16:32:00,757 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 16:32:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:00,757 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 16:32:00,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 16:32:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 16:32:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 16:32:00,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:00,759 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:00,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:32:00,760 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:00,760 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-21 16:32:00,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:00,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919681610] [2020-08-21 16:32:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 16:32:00,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919681610] [2020-08-21 16:32:00,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:00,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 16:32:00,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562625976] [2020-08-21 16:32:00,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:32:00,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:00,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:32:00,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:32:00,925 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 16:32:01,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:01,022 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 16:32:01,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:32:01,023 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 16:32:01,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:01,025 INFO L225 Difference]: With dead ends: 28 [2020-08-21 16:32:01,025 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 16:32:01,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:32:01,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 16:32:01,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 16:32:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 16:32:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 16:32:01,033 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 16:32:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:01,034 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 16:32:01,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:32:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 16:32:01,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 16:32:01,035 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:01,036 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:01,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:32:01,036 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:01,037 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-21 16:32:01,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:01,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23275153] [2020-08-21 16:32:01,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 16:32:01,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23275153] [2020-08-21 16:32:01,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:01,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 16:32:01,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657676200] [2020-08-21 16:32:01,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:32:01,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:01,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:32:01,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:32:01,275 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 16:32:01,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:01,359 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 16:32:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:32:01,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 16:32:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:01,361 INFO L225 Difference]: With dead ends: 31 [2020-08-21 16:32:01,361 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 16:32:01,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:32:01,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 16:32:01,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 16:32:01,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 16:32:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 16:32:01,369 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 16:32:01,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:01,369 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 16:32:01,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:32:01,370 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 16:32:01,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 16:32:01,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:01,371 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:01,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:32:01,372 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:01,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:01,372 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-21 16:32:01,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:01,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129057979] [2020-08-21 16:32:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 16:32:01,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129057979] [2020-08-21 16:32:01,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:01,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:32:01,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206069771] [2020-08-21 16:32:01,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:32:01,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:01,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:32:01,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:32:01,662 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 16:32:01,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:01,774 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 16:32:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:32:01,776 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 16:32:01,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:01,777 INFO L225 Difference]: With dead ends: 34 [2020-08-21 16:32:01,777 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 16:32:01,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-21 16:32:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 16:32:01,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 16:32:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 16:32:01,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 16:32:01,793 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 16:32:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:01,793 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 16:32:01,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:32:01,793 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 16:32:01,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 16:32:01,800 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:01,800 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:01,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:32:01,801 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:01,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:01,802 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-21 16:32:01,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:01,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652730943] [2020-08-21 16:32:01,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 16:32:01,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652730943] [2020-08-21 16:32:01,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:01,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 16:32:01,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5101355] [2020-08-21 16:32:01,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:32:01,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:01,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:32:01,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:32:01,994 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 16:32:02,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:02,090 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 16:32:02,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 16:32:02,090 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 16:32:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:02,092 INFO L225 Difference]: With dead ends: 37 [2020-08-21 16:32:02,092 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 16:32:02,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-21 16:32:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 16:32:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 16:32:02,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 16:32:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 16:32:02,101 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 16:32:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:02,101 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 16:32:02,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:32:02,102 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 16:32:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 16:32:02,103 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:02,104 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:02,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:32:02,104 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:02,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:02,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-21 16:32:02,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:02,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394169717] [2020-08-21 16:32:02,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 16:32:02,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394169717] [2020-08-21 16:32:02,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:02,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 16:32:02,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869070098] [2020-08-21 16:32:02,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 16:32:02,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:02,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 16:32:02,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:32:02,329 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 16:32:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:02,435 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 16:32:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:32:02,436 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 16:32:02,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:02,437 INFO L225 Difference]: With dead ends: 40 [2020-08-21 16:32:02,437 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 16:32:02,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-21 16:32:02,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 16:32:02,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 16:32:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 16:32:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 16:32:02,446 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 16:32:02,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:02,446 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 16:32:02,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 16:32:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 16:32:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 16:32:02,448 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:02,448 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:02,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:32:02,449 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:02,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-21 16:32:02,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:02,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101757861] [2020-08-21 16:32:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 16:32:02,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101757861] [2020-08-21 16:32:02,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:02,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 16:32:02,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896139529] [2020-08-21 16:32:02,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:32:02,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:02,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:32:02,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:32:02,678 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 16:32:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:02,810 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 16:32:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 16:32:02,810 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 16:32:02,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:02,812 INFO L225 Difference]: With dead ends: 43 [2020-08-21 16:32:02,812 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 16:32:02,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-21 16:32:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 16:32:02,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 16:32:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 16:32:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 16:32:02,826 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 16:32:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:02,826 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 16:32:02,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 16:32:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 16:32:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 16:32:02,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:02,828 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:02,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:32:02,829 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:02,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-21 16:32:02,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:02,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033346418] [2020-08-21 16:32:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:02,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 16:32:03,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033346418] [2020-08-21 16:32:03,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:03,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 16:32:03,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040648400] [2020-08-21 16:32:03,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 16:32:03,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:03,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 16:32:03,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:32:03,121 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 16:32:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:03,251 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 16:32:03,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 16:32:03,251 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 16:32:03,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:03,253 INFO L225 Difference]: With dead ends: 46 [2020-08-21 16:32:03,253 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 16:32:03,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-21 16:32:03,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 16:32:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 16:32:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 16:32:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 16:32:03,261 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 16:32:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:03,262 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 16:32:03,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 16:32:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 16:32:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 16:32:03,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:03,263 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:03,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:32:03,264 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-21 16:32:03,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:03,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681215103] [2020-08-21 16:32:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 16:32:03,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681215103] [2020-08-21 16:32:03,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:03,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 16:32:03,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306187052] [2020-08-21 16:32:03,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 16:32:03,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:03,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 16:32:03,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 16:32:03,634 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 16:32:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:03,770 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 16:32:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 16:32:03,771 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 16:32:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:03,772 INFO L225 Difference]: With dead ends: 49 [2020-08-21 16:32:03,772 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 16:32:03,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-21 16:32:03,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 16:32:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 16:32:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 16:32:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 16:32:03,779 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 16:32:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:03,780 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 16:32:03,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 16:32:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 16:32:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 16:32:03,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:03,781 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:03,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:32:03,781 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:03,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-21 16:32:03,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:03,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150197281] [2020-08-21 16:32:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:03,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-21 16:32:04,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150197281] [2020-08-21 16:32:04,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:04,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 16:32:04,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539788344] [2020-08-21 16:32:04,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 16:32:04,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:04,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 16:32:04,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 16:32:04,138 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-21 16:32:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:04,326 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 16:32:04,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:32:04,327 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-21 16:32:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:04,328 INFO L225 Difference]: With dead ends: 52 [2020-08-21 16:32:04,328 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 16:32:04,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-21 16:32:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 16:32:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 16:32:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 16:32:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 16:32:04,344 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 16:32:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:04,345 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 16:32:04,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 16:32:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 16:32:04,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 16:32:04,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:04,349 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:04,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:32:04,349 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:04,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-21 16:32:04,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:04,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834371455] [2020-08-21 16:32:04,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-21 16:32:04,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834371455] [2020-08-21 16:32:04,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:04,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 16:32:04,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054996247] [2020-08-21 16:32:04,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 16:32:04,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:04,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 16:32:04,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 16:32:04,840 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-21 16:32:05,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:05,046 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-21 16:32:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 16:32:05,047 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-21 16:32:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:05,048 INFO L225 Difference]: With dead ends: 55 [2020-08-21 16:32:05,048 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 16:32:05,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-21 16:32:05,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 16:32:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-21 16:32:05,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 16:32:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 16:32:05,062 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-21 16:32:05,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:05,062 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 16:32:05,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 16:32:05,062 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 16:32:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 16:32:05,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:05,065 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:05,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 16:32:05,065 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:05,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:05,066 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-21 16:32:05,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:05,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642257858] [2020-08-21 16:32:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-21 16:32:05,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642257858] [2020-08-21 16:32:05,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:05,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 16:32:05,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174616885] [2020-08-21 16:32:05,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 16:32:05,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:05,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 16:32:05,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 16:32:05,653 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-21 16:32:05,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:05,836 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-21 16:32:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 16:32:05,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-21 16:32:05,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:05,838 INFO L225 Difference]: With dead ends: 58 [2020-08-21 16:32:05,838 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 16:32:05,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-21 16:32:05,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 16:32:05,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-21 16:32:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 16:32:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-21 16:32:05,852 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-21 16:32:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:05,853 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-21 16:32:05,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 16:32:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-21 16:32:05,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 16:32:05,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:05,855 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:05,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 16:32:05,856 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:05,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-21 16:32:05,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:05,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017386275] [2020-08-21 16:32:05,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:05,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-21 16:32:06,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017386275] [2020-08-21 16:32:06,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:06,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 16:32:06,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130798722] [2020-08-21 16:32:06,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 16:32:06,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:06,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 16:32:06,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 16:32:06,528 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-21 16:32:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:06,743 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-21 16:32:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 16:32:06,744 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-21 16:32:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:06,745 INFO L225 Difference]: With dead ends: 61 [2020-08-21 16:32:06,745 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 16:32:06,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-21 16:32:06,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 16:32:06,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 16:32:06,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 16:32:06,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-21 16:32:06,759 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-21 16:32:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:06,760 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-21 16:32:06,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 16:32:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-21 16:32:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 16:32:06,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:06,763 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:06,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 16:32:06,763 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:06,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-21 16:32:06,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:06,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139208689] [2020-08-21 16:32:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:06,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-21 16:32:07,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139208689] [2020-08-21 16:32:07,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:07,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 16:32:07,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116359669] [2020-08-21 16:32:07,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 16:32:07,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:07,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 16:32:07,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 16:32:07,451 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-21 16:32:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:07,659 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-21 16:32:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 16:32:07,659 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 16:32:07,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:07,660 INFO L225 Difference]: With dead ends: 64 [2020-08-21 16:32:07,660 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 16:32:07,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 16:32:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 16:32:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-21 16:32:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 16:32:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-21 16:32:07,667 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-21 16:32:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:07,667 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-21 16:32:07,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 16:32:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-21 16:32:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 16:32:07,669 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:07,669 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:07,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 16:32:07,669 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:07,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:07,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-21 16:32:07,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:07,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888247930] [2020-08-21 16:32:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:07,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-21 16:32:08,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888247930] [2020-08-21 16:32:08,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:08,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 16:32:08,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65215136] [2020-08-21 16:32:08,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 16:32:08,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 16:32:08,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 16:32:08,381 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-21 16:32:08,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:08,599 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-21 16:32:08,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 16:32:08,600 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-21 16:32:08,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:08,601 INFO L225 Difference]: With dead ends: 67 [2020-08-21 16:32:08,601 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 16:32:08,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 16:32:08,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 16:32:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 16:32:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 16:32:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-21 16:32:08,610 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-21 16:32:08,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:08,612 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-21 16:32:08,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 16:32:08,612 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-21 16:32:08,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 16:32:08,614 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:08,614 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:08,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 16:32:08,614 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:08,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:08,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-08-21 16:32:08,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:08,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260171945] [2020-08-21 16:32:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:08,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-21 16:32:09,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260171945] [2020-08-21 16:32:09,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:09,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 16:32:09,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27222760] [2020-08-21 16:32:09,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 16:32:09,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:09,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 16:32:09,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 16:32:09,307 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-21 16:32:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:09,585 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-21 16:32:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 16:32:09,586 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-21 16:32:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:09,587 INFO L225 Difference]: With dead ends: 70 [2020-08-21 16:32:09,587 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 16:32:09,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 16:32:09,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 16:32:09,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-21 16:32:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 16:32:09,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-21 16:32:09,593 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-21 16:32:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:09,593 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-21 16:32:09,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 16:32:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-21 16:32:09,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 16:32:09,595 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:09,595 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:09,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 16:32:09,596 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:09,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:09,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-08-21 16:32:09,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:09,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901795272] [2020-08-21 16:32:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:09,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-21 16:32:10,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901795272] [2020-08-21 16:32:10,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:10,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 16:32:10,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832116747] [2020-08-21 16:32:10,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 16:32:10,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:10,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 16:32:10,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 16:32:10,382 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-21 16:32:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:10,647 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-21 16:32:10,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 16:32:10,648 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-21 16:32:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:10,649 INFO L225 Difference]: With dead ends: 73 [2020-08-21 16:32:10,649 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 16:32:10,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 16:32:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 16:32:10,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-21 16:32:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 16:32:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-21 16:32:10,655 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-21 16:32:10,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:10,655 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-21 16:32:10,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 16:32:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-21 16:32:10,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 16:32:10,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:10,657 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:10,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 16:32:10,658 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:10,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:10,658 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-08-21 16:32:10,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:10,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411908071] [2020-08-21 16:32:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:10,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-21 16:32:11,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411908071] [2020-08-21 16:32:11,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:11,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 16:32:11,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814378791] [2020-08-21 16:32:11,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 16:32:11,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:11,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 16:32:11,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 16:32:11,412 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-21 16:32:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:11,683 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-21 16:32:11,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 16:32:11,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-21 16:32:11,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:11,684 INFO L225 Difference]: With dead ends: 76 [2020-08-21 16:32:11,684 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 16:32:11,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-21 16:32:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 16:32:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-21 16:32:11,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 16:32:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-21 16:32:11,690 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-21 16:32:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:11,690 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-21 16:32:11,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 16:32:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-21 16:32:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 16:32:11,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:11,692 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:11,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 16:32:11,692 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:11,692 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-08-21 16:32:11,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:11,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497941774] [2020-08-21 16:32:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:11,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-21 16:32:12,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497941774] [2020-08-21 16:32:12,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:12,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 16:32:12,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866555638] [2020-08-21 16:32:12,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 16:32:12,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:12,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 16:32:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 16:32:12,494 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-21 16:32:12,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:12,811 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-21 16:32:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 16:32:12,812 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-21 16:32:12,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:12,813 INFO L225 Difference]: With dead ends: 79 [2020-08-21 16:32:12,813 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 16:32:12,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-21 16:32:12,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 16:32:12,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-21 16:32:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 16:32:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-21 16:32:12,818 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-21 16:32:12,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:12,818 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-21 16:32:12,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 16:32:12,819 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-21 16:32:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 16:32:12,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:12,820 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:12,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 16:32:12,821 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:12,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:12,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-08-21 16:32:12,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:12,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41361076] [2020-08-21 16:32:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:12,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-21 16:32:13,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41361076] [2020-08-21 16:32:13,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:13,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 16:32:13,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427860024] [2020-08-21 16:32:13,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 16:32:13,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:13,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 16:32:13,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-21 16:32:13,932 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2020-08-21 16:32:14,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:14,339 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-21 16:32:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 16:32:14,339 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2020-08-21 16:32:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:14,340 INFO L225 Difference]: With dead ends: 82 [2020-08-21 16:32:14,341 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 16:32:14,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-08-21 16:32:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 16:32:14,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 16:32:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 16:32:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-21 16:32:14,346 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-21 16:32:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:14,346 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-21 16:32:14,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 16:32:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-21 16:32:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-21 16:32:14,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:14,348 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:14,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 16:32:14,348 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:14,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2020-08-21 16:32:14,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:14,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325028273] [2020-08-21 16:32:14,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:14,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:15,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:15,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:15,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:15,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:15,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:15,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-21 16:32:15,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325028273] [2020-08-21 16:32:15,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:15,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 16:32:15,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303124275] [2020-08-21 16:32:15,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 16:32:15,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:15,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 16:32:15,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-21 16:32:15,458 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2020-08-21 16:32:15,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:15,779 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-21 16:32:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 16:32:15,783 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-08-21 16:32:15,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:15,784 INFO L225 Difference]: With dead ends: 85 [2020-08-21 16:32:15,784 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 16:32:15,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-08-21 16:32:15,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 16:32:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-21 16:32:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 16:32:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-21 16:32:15,789 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-21 16:32:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:15,790 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-21 16:32:15,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 16:32:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-21 16:32:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-21 16:32:15,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:15,792 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:15,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 16:32:15,792 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:15,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1314278308, now seen corresponding path program 22 times [2020-08-21 16:32:15,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:15,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58882352] [2020-08-21 16:32:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:15,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:15,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:15,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:15,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-21 16:32:16,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58882352] [2020-08-21 16:32:16,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:16,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 16:32:16,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842695149] [2020-08-21 16:32:16,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 16:32:16,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:16,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 16:32:16,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-21 16:32:16,921 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2020-08-21 16:32:17,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:17,298 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-21 16:32:17,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 16:32:17,303 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2020-08-21 16:32:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:17,305 INFO L225 Difference]: With dead ends: 88 [2020-08-21 16:32:17,305 INFO L226 Difference]: Without dead ends: 84 [2020-08-21 16:32:17,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2020-08-21 16:32:17,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-21 16:32:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-21 16:32:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 16:32:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-21 16:32:17,311 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-21 16:32:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:17,312 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-21 16:32:17,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 16:32:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-21 16:32:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 16:32:17,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:17,314 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:17,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 16:32:17,314 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:17,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:17,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2015638980, now seen corresponding path program 23 times [2020-08-21 16:32:17,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:17,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617649540] [2020-08-21 16:32:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:17,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:17,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:17,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:17,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:17,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:17,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:17,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:17,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:17,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:17,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:17,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:17,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:17,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:18,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:18,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:18,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:18,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:18,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:18,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:18,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:18,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:18,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:18,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:18,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:18,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-21 16:32:18,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617649540] [2020-08-21 16:32:18,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:18,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 16:32:18,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494711625] [2020-08-21 16:32:18,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 16:32:18,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:18,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 16:32:18,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-21 16:32:18,626 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2020-08-21 16:32:19,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:19,035 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-21 16:32:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 16:32:19,039 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2020-08-21 16:32:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:19,040 INFO L225 Difference]: With dead ends: 91 [2020-08-21 16:32:19,040 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 16:32:19,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2020-08-21 16:32:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 16:32:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-21 16:32:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 16:32:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-21 16:32:19,051 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-21 16:32:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:19,051 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-21 16:32:19,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 16:32:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-21 16:32:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-21 16:32:19,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:19,053 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:19,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 16:32:19,054 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:19,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:19,055 INFO L82 PathProgramCache]: Analyzing trace with hash 483163804, now seen corresponding path program 24 times [2020-08-21 16:32:19,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:19,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077656176] [2020-08-21 16:32:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:32:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:19,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:20,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:20,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:20,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:32:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-21 16:32:20,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077656176] [2020-08-21 16:32:20,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:32:20,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 16:32:20,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896380890] [2020-08-21 16:32:20,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 16:32:20,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:20,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 16:32:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-21 16:32:20,210 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2020-08-21 16:32:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:20,618 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-21 16:32:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 16:32:20,619 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2020-08-21 16:32:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:20,621 INFO L225 Difference]: With dead ends: 94 [2020-08-21 16:32:20,621 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 16:32:20,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2020-08-21 16:32:20,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 16:32:20,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-21 16:32:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 16:32:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-21 16:32:20,628 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-21 16:32:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:20,628 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-21 16:32:20,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 16:32:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-21 16:32:20,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-21 16:32:20,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:20,630 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:20,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 16:32:20,630 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:20,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1060706820, now seen corresponding path program 25 times [2020-08-21 16:32:20,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:20,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380516743] [2020-08-21 16:32:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 16:32:20,657 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 16:32:20,657 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:32:20,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 16:32:20,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:32:20 BoogieIcfgContainer [2020-08-21 16:32:20,694 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:32:20,701 INFO L168 Benchmark]: Toolchain (without parser) took 21358.54 ms. Allocated memory was 149.4 MB in the beginning and 612.9 MB in the end (delta: 463.5 MB). Free memory was 105.4 MB in the beginning and 577.7 MB in the end (delta: -472.3 MB). Peak memory consumption was 453.1 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:20,702 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 149.4 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 16:32:20,702 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.41 ms. Allocated memory is still 149.4 MB. Free memory was 105.2 MB in the beginning and 95.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:20,703 INFO L168 Benchmark]: Boogie Preprocessor took 23.65 ms. Allocated memory is still 149.4 MB. Free memory was 95.9 MB in the beginning and 94.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:20,703 INFO L168 Benchmark]: RCFGBuilder took 341.13 ms. Allocated memory was 149.4 MB in the beginning and 203.4 MB in the end (delta: 54.0 MB). Free memory was 94.5 MB in the beginning and 171.6 MB in the end (delta: -77.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:20,706 INFO L168 Benchmark]: TraceAbstraction took 20729.55 ms. Allocated memory was 203.4 MB in the beginning and 612.9 MB in the end (delta: 409.5 MB). Free memory was 170.7 MB in the beginning and 577.7 MB in the end (delta: -407.0 MB). Peak memory consumption was 464.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:20,708 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 149.4 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.41 ms. Allocated memory is still 149.4 MB. Free memory was 105.2 MB in the beginning and 95.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.65 ms. Allocated memory is still 149.4 MB. Free memory was 95.9 MB in the beginning and 94.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 341.13 ms. Allocated memory was 149.4 MB in the beginning and 203.4 MB in the end (delta: 54.0 MB). Free memory was 94.5 MB in the beginning and 171.6 MB in the end (delta: -77.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20729.55 ms. Allocated memory was 203.4 MB in the beginning and 612.9 MB in the end (delta: 409.5 MB). Free memory was 170.7 MB in the beginning and 577.7 MB in the end (delta: -407.0 MB). Peak memory consumption was 464.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 25; [L13] int b = 0; [L14] CALL, EXPR sum(a, b) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND TRUE n <= 0 [L5] return m + n; [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.5s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 303 SDtfs, 778 SDslu, 1572 SDs, 0 SdLazy, 1115 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1425 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 700 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 8.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 2288 NumberOfCodeBlocks, 2288 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 2100 ConstructedInterpolants, 0 QuantifiedInterpolants, 570000 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 7500/15000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...