/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_25x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:25:05,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:25:05,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:25:05,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:25:05,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:25:05,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:25:05,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:25:05,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:25:05,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:25:05,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:25:05,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:25:05,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:25:05,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:25:05,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:25:05,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:25:05,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:25:05,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:25:05,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:25:05,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:25:05,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:25:05,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:25:05,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:25:05,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:25:05,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:25:05,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 01:25:05,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 01:25:05,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 01:25:05,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 01:25:05,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 01:25:05,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 01:25:05,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:25:05,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:25:05,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:25:05,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 01:25:05,925 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:25:05,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:25:05,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:25:05,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:25:05,927 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:25:05,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:25:05,928 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:25:05,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:25:05,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:25:05,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:25:05,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:25:05,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:25:05,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:25:05,931 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:25:05,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:25:05,932 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:25:05,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:25:05,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:25:05,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:25:05,932 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:25:05,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:25:05,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:25:05,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:25:05,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:25:05,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:25:05,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:25:05,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:25:05,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:25:05,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:25:05,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:25:06,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:25:06,270 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:25:06,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:25:06,278 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:25:06,279 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:25:06,280 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_25x0-2.c [2020-08-22 01:25:06,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d7d6ef44/147178a2470a43a9acb91f40e1e76769/FLAGa59d9a434 [2020-08-22 01:25:06,825 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:25:06,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_25x0-2.c [2020-08-22 01:25:06,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d7d6ef44/147178a2470a43a9acb91f40e1e76769/FLAGa59d9a434 [2020-08-22 01:25:07,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d7d6ef44/147178a2470a43a9acb91f40e1e76769 [2020-08-22 01:25:07,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:25:07,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:25:07,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:25:07,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:25:07,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:25:07,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:25:07" (1/1) ... [2020-08-22 01:25:07,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20780c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:07, skipping insertion in model container [2020-08-22 01:25:07,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:25:07" (1/1) ... [2020-08-22 01:25:07,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:25:07,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:25:07,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:25:07,394 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:25:07,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:25:07,423 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:25:07,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:07 WrapperNode [2020-08-22 01:25:07,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:25:07,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:25:07,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:25:07,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:25:07,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:07" (1/1) ... [2020-08-22 01:25:07,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:07" (1/1) ... [2020-08-22 01:25:07,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:07" (1/1) ... [2020-08-22 01:25:07,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:07" (1/1) ... [2020-08-22 01:25:07,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:07" (1/1) ... [2020-08-22 01:25:07,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:07" (1/1) ... [2020-08-22 01:25:07,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:07" (1/1) ... [2020-08-22 01:25:07,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:25:07,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:25:07,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:25:07,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:25:07,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:25:07,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:25:07,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:25:07,610 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-22 01:25:07,610 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:25:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:25:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-22 01:25:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:25:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:25:07,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:25:07,775 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:25:07,775 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 01:25:07,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:25:07 BoogieIcfgContainer [2020-08-22 01:25:07,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:25:07,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:25:07,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:25:07,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:25:07,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:25:07" (1/3) ... [2020-08-22 01:25:07,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1307ffe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:25:07, skipping insertion in model container [2020-08-22 01:25:07,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:07" (2/3) ... [2020-08-22 01:25:07,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1307ffe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:25:07, skipping insertion in model container [2020-08-22 01:25:07,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:25:07" (3/3) ... [2020-08-22 01:25:07,788 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_25x0-2.c [2020-08-22 01:25:07,799 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:25:07,806 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:25:07,821 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:25:07,864 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:25:07,868 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:25:07,868 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:25:07,869 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:25:07,869 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:25:07,869 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:25:07,869 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:25:07,870 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:25:07,895 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 01:25:07,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 01:25:07,904 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:07,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:07,906 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:07,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:07,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-22 01:25:07,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:07,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212543300] [2020-08-22 01:25:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:25:08,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212543300] [2020-08-22 01:25:08,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:08,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:25:08,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644717420] [2020-08-22 01:25:08,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:25:08,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:08,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:25:08,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:25:08,152 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 01:25:08,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:08,247 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 01:25:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:25:08,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 01:25:08,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:08,259 INFO L225 Difference]: With dead ends: 30 [2020-08-22 01:25:08,260 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 01:25:08,263 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 [2020-08-22 01:25:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 01:25:08,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 01:25:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 01:25:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 01:25:08,307 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 01:25:08,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:08,307 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 01:25:08,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:25:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 01:25:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 01:25:08,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:08,310 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:08,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:25:08,310 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:08,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:08,311 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-22 01:25:08,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:08,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360153390] [2020-08-22 01:25:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 01:25:08,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360153390] [2020-08-22 01:25:08,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:08,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 01:25:08,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105868177] [2020-08-22 01:25:08,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:25:08,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:08,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:25:08,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:25:08,451 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-22 01:25:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:08,517 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 01:25:08,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:25:08,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 01:25:08,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:08,519 INFO L225 Difference]: With dead ends: 25 [2020-08-22 01:25:08,519 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 01:25:08,521 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 [2020-08-22 01:25:08,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 01:25:08,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 01:25:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 01:25:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 01:25:08,533 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 01:25:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:08,534 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 01:25:08,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:25:08,535 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 01:25:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 01:25:08,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:08,537 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:08,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:25:08,539 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:08,540 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-22 01:25:08,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:08,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604469732] [2020-08-22 01:25:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 01:25:08,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604469732] [2020-08-22 01:25:08,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:08,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 01:25:08,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769035450] [2020-08-22 01:25:08,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:25:08,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:08,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:25:08,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:25:08,708 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-22 01:25:08,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:08,805 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 01:25:08,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:25:08,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-22 01:25:08,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:08,807 INFO L225 Difference]: With dead ends: 28 [2020-08-22 01:25:08,807 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 01:25:08,808 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 [2020-08-22 01:25:08,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 01:25:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 01:25:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 01:25:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 01:25:08,815 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 01:25:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:08,816 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 01:25:08,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:25:08,816 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 01:25:08,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 01:25:08,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:08,818 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:08,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:25:08,818 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:08,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:08,819 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-22 01:25:08,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:08,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5962081] [2020-08-22 01:25:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:08,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 01:25:09,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5962081] [2020-08-22 01:25:09,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:09,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 01:25:09,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183643533] [2020-08-22 01:25:09,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:25:09,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:09,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:25:09,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:25:09,003 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-22 01:25:09,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:09,085 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 01:25:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:25:09,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-22 01:25:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:09,086 INFO L225 Difference]: With dead ends: 31 [2020-08-22 01:25:09,087 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 01:25:09,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:25:09,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 01:25:09,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 01:25:09,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 01:25:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 01:25:09,094 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 01:25:09,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:09,095 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 01:25:09,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:25:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 01:25:09,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 01:25:09,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:09,097 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:09,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:25:09,097 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:09,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:09,098 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-22 01:25:09,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:09,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410656764] [2020-08-22 01:25:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 01:25:09,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410656764] [2020-08-22 01:25:09,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:09,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:25:09,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627238501] [2020-08-22 01:25:09,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:25:09,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:09,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:25:09,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:25:09,268 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-22 01:25:09,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:09,356 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 01:25:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:25:09,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-22 01:25:09,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:09,358 INFO L225 Difference]: With dead ends: 34 [2020-08-22 01:25:09,358 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 01:25:09,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:25:09,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 01:25:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 01:25:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 01:25:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 01:25:09,366 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 01:25:09,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:09,367 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 01:25:09,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:25:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 01:25:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 01:25:09,368 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:09,369 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:09,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:25:09,369 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:09,370 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-22 01:25:09,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:09,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505674742] [2020-08-22 01:25:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 01:25:09,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505674742] [2020-08-22 01:25:09,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:09,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:25:09,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432987453] [2020-08-22 01:25:09,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:25:09,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:09,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:25:09,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:25:09,547 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-22 01:25:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:09,639 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 01:25:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:25:09,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-22 01:25:09,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:09,641 INFO L225 Difference]: With dead ends: 37 [2020-08-22 01:25:09,641 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 01:25:09,642 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 [2020-08-22 01:25:09,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 01:25:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 01:25:09,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 01:25:09,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 01:25:09,649 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 01:25:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:09,650 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 01:25:09,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:25:09,650 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 01:25:09,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 01:25:09,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:09,652 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:09,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:25:09,653 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:09,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:09,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-22 01:25:09,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:09,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162556872] [2020-08-22 01:25:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 01:25:09,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162556872] [2020-08-22 01:25:09,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:09,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 01:25:09,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193983743] [2020-08-22 01:25:09,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:25:09,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:09,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:25:09,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:25:09,868 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-22 01:25:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:09,964 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 01:25:09,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:25:09,965 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-22 01:25:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:09,966 INFO L225 Difference]: With dead ends: 40 [2020-08-22 01:25:09,966 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 01:25:09,967 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 [2020-08-22 01:25:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 01:25:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 01:25:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 01:25:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 01:25:09,973 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 01:25:09,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:09,974 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 01:25:09,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:25:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 01:25:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 01:25:09,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:09,975 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:09,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:25:09,976 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:09,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-22 01:25:09,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:09,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478565223] [2020-08-22 01:25:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 01:25:10,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478565223] [2020-08-22 01:25:10,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:10,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 01:25:10,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520885881] [2020-08-22 01:25:10,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 01:25:10,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:10,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 01:25:10,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:25:10,205 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-22 01:25:10,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:10,325 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 01:25:10,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 01:25:10,325 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-22 01:25:10,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:10,327 INFO L225 Difference]: With dead ends: 43 [2020-08-22 01:25:10,327 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 01:25:10,328 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 [2020-08-22 01:25:10,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 01:25:10,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 01:25:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 01:25:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 01:25:10,334 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 01:25:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:10,334 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 01:25:10,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 01:25:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 01:25:10,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 01:25:10,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:10,336 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:10,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:25:10,336 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:10,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:10,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-22 01:25:10,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:10,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042577732] [2020-08-22 01:25:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 01:25:10,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042577732] [2020-08-22 01:25:10,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:10,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:25:10,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196233270] [2020-08-22 01:25:10,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:25:10,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:10,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:25:10,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:25:10,621 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-22 01:25:10,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:10,761 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 01:25:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:25:10,761 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-22 01:25:10,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:10,763 INFO L225 Difference]: With dead ends: 46 [2020-08-22 01:25:10,763 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 01:25:10,764 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 [2020-08-22 01:25:10,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 01:25:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 01:25:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 01:25:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 01:25:10,770 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 01:25:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:10,771 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 01:25:10,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:25:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 01:25:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 01:25:10,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:10,772 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:10,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:25:10,773 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:10,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:10,773 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-22 01:25:10,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:10,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665695583] [2020-08-22 01:25:10,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:10,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 01:25:11,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665695583] [2020-08-22 01:25:11,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:11,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 01:25:11,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988447523] [2020-08-22 01:25:11,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 01:25:11,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:11,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 01:25:11,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:25:11,143 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-22 01:25:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:11,302 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 01:25:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 01:25:11,305 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-22 01:25:11,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:11,306 INFO L225 Difference]: With dead ends: 49 [2020-08-22 01:25:11,307 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 01:25:11,310 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 [2020-08-22 01:25:11,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 01:25:11,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 01:25:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 01:25:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 01:25:11,319 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 01:25:11,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:11,319 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 01:25:11,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 01:25:11,319 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 01:25:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 01:25:11,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:11,324 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:11,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:25:11,325 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-22 01:25:11,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:11,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853986131] [2020-08-22 01:25:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 01:25:11,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853986131] [2020-08-22 01:25:11,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:11,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 01:25:11,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82286913] [2020-08-22 01:25:11,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:25:11,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:11,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:25:11,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:25:11,780 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-22 01:25:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:11,945 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 01:25:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:25:11,946 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-22 01:25:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:11,947 INFO L225 Difference]: With dead ends: 52 [2020-08-22 01:25:11,947 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 01:25:11,948 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 [2020-08-22 01:25:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 01:25:11,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 01:25:11,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 01:25:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 01:25:11,954 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 01:25:11,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:11,955 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 01:25:11,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:25:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 01:25:11,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 01:25:11,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:11,956 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:11,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:25:11,957 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:11,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-22 01:25:11,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:11,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117019332] [2020-08-22 01:25:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 01:25:12,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117019332] [2020-08-22 01:25:12,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:12,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 01:25:12,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440440144] [2020-08-22 01:25:12,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 01:25:12,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:12,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 01:25:12,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:25:12,385 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-22 01:25:12,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:12,556 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 01:25:12,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:25:12,556 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-22 01:25:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:12,557 INFO L225 Difference]: With dead ends: 55 [2020-08-22 01:25:12,558 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 01:25:12,559 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 [2020-08-22 01:25:12,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 01:25:12,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 01:25:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 01:25:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 01:25:12,566 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 01:25:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:12,566 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 01:25:12,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 01:25:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 01:25:12,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 01:25:12,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:12,568 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:12,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:25:12,568 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:12,569 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-22 01:25:12,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:12,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741264173] [2020-08-22 01:25:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:12,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 01:25:13,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741264173] [2020-08-22 01:25:13,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:13,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 01:25:13,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881674758] [2020-08-22 01:25:13,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 01:25:13,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:13,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 01:25:13,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:25:13,070 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-22 01:25:13,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:13,329 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 01:25:13,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 01:25:13,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-22 01:25:13,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:13,331 INFO L225 Difference]: With dead ends: 58 [2020-08-22 01:25:13,331 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 01:25:13,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-22 01:25:13,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 01:25:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 01:25:13,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 01:25:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 01:25:13,338 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 01:25:13,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:13,338 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 01:25:13,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 01:25:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 01:25:13,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 01:25:13,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:13,340 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:13,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:25:13,340 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:13,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:13,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-22 01:25:13,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:13,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294294737] [2020-08-22 01:25:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 01:25:13,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294294737] [2020-08-22 01:25:13,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:13,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 01:25:13,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106545254] [2020-08-22 01:25:13,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 01:25:13,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:13,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 01:25:13,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:25:13,842 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-22 01:25:14,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:14,033 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 01:25:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:25:14,034 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-22 01:25:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:14,035 INFO L225 Difference]: With dead ends: 61 [2020-08-22 01:25:14,036 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 01:25:14,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-22 01:25:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 01:25:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 01:25:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 01:25:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 01:25:14,053 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 01:25:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:14,054 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 01:25:14,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 01:25:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 01:25:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 01:25:14,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:14,057 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:14,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:25:14,057 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:14,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:14,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-22 01:25:14,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:14,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988320276] [2020-08-22 01:25:14,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 01:25:14,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988320276] [2020-08-22 01:25:14,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:14,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 01:25:14,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691481913] [2020-08-22 01:25:14,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 01:25:14,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:14,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 01:25:14,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:25:14,722 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-22 01:25:14,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:14,970 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 01:25:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 01:25:14,970 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-22 01:25:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:14,971 INFO L225 Difference]: With dead ends: 64 [2020-08-22 01:25:14,971 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 01:25:14,973 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 [2020-08-22 01:25:14,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 01:25:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 01:25:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 01:25:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 01:25:14,984 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 01:25:14,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:14,985 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 01:25:14,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 01:25:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 01:25:14,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 01:25:14,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:14,987 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:14,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:25:14,987 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:14,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-22 01:25:14,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:14,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970455684] [2020-08-22 01:25:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 01:25:15,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970455684] [2020-08-22 01:25:15,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:15,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 01:25:15,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883795991] [2020-08-22 01:25:15,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 01:25:15,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:15,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 01:25:15,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:25:15,666 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-08-22 01:25:15,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:15,908 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-22 01:25:15,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:25:15,908 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-08-22 01:25:15,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:15,909 INFO L225 Difference]: With dead ends: 67 [2020-08-22 01:25:15,910 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 01:25:15,911 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 [2020-08-22 01:25:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 01:25:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 01:25:15,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 01:25:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 01:25:15,915 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-22 01:25:15,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:15,916 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 01:25:15,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 01:25:15,916 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 01:25:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 01:25:15,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:15,917 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:15,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:25:15,918 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:15,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:15,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-08-22 01:25:15,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:15,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342724555] [2020-08-22 01:25:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:15,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 01:25:16,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342724555] [2020-08-22 01:25:16,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:16,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 01:25:16,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738728447] [2020-08-22 01:25:16,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 01:25:16,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:16,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 01:25:16,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:25:16,607 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-22 01:25:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:16,902 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-22 01:25:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 01:25:16,903 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-22 01:25:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:16,904 INFO L225 Difference]: With dead ends: 70 [2020-08-22 01:25:16,904 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 01:25:16,906 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 [2020-08-22 01:25:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 01:25:16,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-22 01:25:16,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 01:25:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-22 01:25:16,910 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-22 01:25:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:16,911 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-22 01:25:16,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 01:25:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-22 01:25:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 01:25:16,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:16,912 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:16,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 01:25:16,913 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:16,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-08-22 01:25:16,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:16,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469986182] [2020-08-22 01:25:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:16,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-22 01:25:17,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469986182] [2020-08-22 01:25:17,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:17,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 01:25:17,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967866145] [2020-08-22 01:25:17,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 01:25:17,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:17,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 01:25:17,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:25:17,744 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2020-08-22 01:25:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:18,033 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-22 01:25:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 01:25:18,034 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-08-22 01:25:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:18,035 INFO L225 Difference]: With dead ends: 73 [2020-08-22 01:25:18,035 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 01:25:18,036 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 [2020-08-22 01:25:18,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 01:25:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-22 01:25:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 01:25:18,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-22 01:25:18,044 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-22 01:25:18,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:18,044 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-22 01:25:18,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 01:25:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-22 01:25:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 01:25:18,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:18,047 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:18,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 01:25:18,047 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:18,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:18,048 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-08-22 01:25:18,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:18,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030912739] [2020-08-22 01:25:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-22 01:25:18,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030912739] [2020-08-22 01:25:18,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:18,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 01:25:18,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187316345] [2020-08-22 01:25:18,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 01:25:18,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:18,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 01:25:18,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:25:18,963 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2020-08-22 01:25:19,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:19,243 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-22 01:25:19,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 01:25:19,244 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-08-22 01:25:19,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:19,245 INFO L225 Difference]: With dead ends: 76 [2020-08-22 01:25:19,245 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 01:25:19,246 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 [2020-08-22 01:25:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 01:25:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-22 01:25:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 01:25:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-22 01:25:19,251 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-22 01:25:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:19,251 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-22 01:25:19,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 01:25:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-22 01:25:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 01:25:19,253 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:19,253 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:19,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 01:25:19,253 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:19,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:19,254 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-08-22 01:25:19,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:19,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214660171] [2020-08-22 01:25:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:19,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-22 01:25:20,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214660171] [2020-08-22 01:25:20,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:20,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 01:25:20,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934436848] [2020-08-22 01:25:20,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 01:25:20,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:20,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 01:25:20,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:25:20,110 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2020-08-22 01:25:20,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:20,439 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-22 01:25:20,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 01:25:20,440 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-08-22 01:25:20,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:20,441 INFO L225 Difference]: With dead ends: 79 [2020-08-22 01:25:20,441 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 01:25:20,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 01:25:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 01:25:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-22 01:25:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 01:25:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-22 01:25:20,449 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-22 01:25:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:20,449 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-22 01:25:20,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 01:25:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-22 01:25:20,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 01:25:20,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:20,451 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:20,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 01:25:20,451 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:20,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:20,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-08-22 01:25:20,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:20,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338022906] [2020-08-22 01:25:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:20,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-22 01:25:21,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338022906] [2020-08-22 01:25:21,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:21,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 01:25:21,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434984895] [2020-08-22 01:25:21,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 01:25:21,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:21,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 01:25:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:25:21,477 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2020-08-22 01:25:21,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:21,838 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-22 01:25:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 01:25:21,839 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2020-08-22 01:25:21,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:21,840 INFO L225 Difference]: With dead ends: 82 [2020-08-22 01:25:21,840 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 01:25:21,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 01:25:21,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 01:25:21,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-22 01:25:21,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 01:25:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-22 01:25:21,845 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-22 01:25:21,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:21,846 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-22 01:25:21,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 01:25:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-22 01:25:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-22 01:25:21,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:21,849 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:21,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 01:25:21,849 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2020-08-22 01:25:21,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:21,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78878995] [2020-08-22 01:25:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:21,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:22,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-22 01:25:23,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78878995] [2020-08-22 01:25:23,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:23,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 01:25:23,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952882471] [2020-08-22 01:25:23,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 01:25:23,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:23,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 01:25:23,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:25:23,076 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2020-08-22 01:25:23,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:23,447 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-22 01:25:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 01:25:23,449 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-08-22 01:25:23,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:23,450 INFO L225 Difference]: With dead ends: 85 [2020-08-22 01:25:23,451 INFO L226 Difference]: Without dead ends: 81 [2020-08-22 01:25:23,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 01:25:23,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-22 01:25:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-22 01:25:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 01:25:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-22 01:25:23,458 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-22 01:25:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:23,458 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-22 01:25:23,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 01:25:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-22 01:25:23,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-22 01:25:23,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:23,460 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:23,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 01:25:23,460 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:23,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:23,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1314278308, now seen corresponding path program 22 times [2020-08-22 01:25:23,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:23,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555694808] [2020-08-22 01:25:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:23,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-22 01:25:24,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555694808] [2020-08-22 01:25:24,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:24,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 01:25:24,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18375125] [2020-08-22 01:25:24,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 01:25:24,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:24,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 01:25:24,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:25:24,586 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2020-08-22 01:25:24,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:24,981 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-22 01:25:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 01:25:24,987 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2020-08-22 01:25:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:24,988 INFO L225 Difference]: With dead ends: 88 [2020-08-22 01:25:24,988 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 01:25:24,990 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 [2020-08-22 01:25:24,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 01:25:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-22 01:25:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 01:25:24,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-22 01:25:24,996 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-22 01:25:24,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:24,996 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-22 01:25:24,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 01:25:24,996 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-22 01:25:24,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-22 01:25:24,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:24,998 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:24,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 01:25:24,998 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2015638980, now seen corresponding path program 23 times [2020-08-22 01:25:24,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:24,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478728926] [2020-08-22 01:25:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:25,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-22 01:25:26,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478728926] [2020-08-22 01:25:26,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:26,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 01:25:26,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756985035] [2020-08-22 01:25:26,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 01:25:26,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:26,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 01:25:26,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:25:26,241 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2020-08-22 01:25:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:26,601 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-22 01:25:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 01:25:26,602 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2020-08-22 01:25:26,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:26,604 INFO L225 Difference]: With dead ends: 91 [2020-08-22 01:25:26,604 INFO L226 Difference]: Without dead ends: 87 [2020-08-22 01:25:26,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 01:25:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-22 01:25:26,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-22 01:25:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 01:25:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-22 01:25:26,618 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-22 01:25:26,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:26,619 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-22 01:25:26,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 01:25:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-22 01:25:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-22 01:25:26,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:26,620 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:26,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 01:25:26,620 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash 483163804, now seen corresponding path program 24 times [2020-08-22 01:25:26,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:26,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945081104] [2020-08-22 01:25:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:25:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:26,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:25:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-22 01:25:27,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945081104] [2020-08-22 01:25:27,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:25:27,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 01:25:27,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138720429] [2020-08-22 01:25:27,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 01:25:27,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:27,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 01:25:27,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-22 01:25:27,813 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2020-08-22 01:25:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:28,215 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-22 01:25:28,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 01:25:28,216 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2020-08-22 01:25:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:28,217 INFO L225 Difference]: With dead ends: 94 [2020-08-22 01:25:28,218 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 01:25:28,220 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 [2020-08-22 01:25:28,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 01:25:28,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-22 01:25:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 01:25:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-22 01:25:28,224 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-22 01:25:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:28,225 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-22 01:25:28,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 01:25:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-22 01:25:28,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-22 01:25:28,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:28,226 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:28,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 01:25:28,227 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:28,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:28,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1060706820, now seen corresponding path program 25 times [2020-08-22 01:25:28,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:28,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709003694] [2020-08-22 01:25:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 01:25:28,259 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 01:25:28,259 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 01:25:28,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 01:25:28,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 01:25:28 BoogieIcfgContainer [2020-08-22 01:25:28,290 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 01:25:28,294 INFO L168 Benchmark]: Toolchain (without parser) took 21077.94 ms. Allocated memory was 141.6 MB in the beginning and 594.5 MB in the end (delta: 453.0 MB). Free memory was 104.1 MB in the beginning and 310.3 MB in the end (delta: -206.2 MB). Peak memory consumption was 246.8 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:28,294 INFO L168 Benchmark]: CDTParser took 1.18 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 01:25:28,295 INFO L168 Benchmark]: CACSL2BoogieTranslator took 208.12 ms. Allocated memory is still 141.6 MB. Free memory was 103.9 MB in the beginning and 94.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:28,296 INFO L168 Benchmark]: Boogie Preprocessor took 28.82 ms. Allocated memory is still 141.6 MB. Free memory was 94.6 MB in the beginning and 93.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:28,299 INFO L168 Benchmark]: RCFGBuilder took 325.95 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 93.2 MB in the beginning and 173.7 MB in the end (delta: -80.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:28,300 INFO L168 Benchmark]: TraceAbstraction took 20509.43 ms. Allocated memory was 205.0 MB in the beginning and 594.5 MB in the end (delta: 389.5 MB). Free memory was 173.1 MB in the beginning and 310.3 MB in the end (delta: -137.3 MB). Peak memory consumption was 252.3 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:28,304 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.18 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 208.12 ms. Allocated memory is still 141.6 MB. Free memory was 103.9 MB in the beginning and 94.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.82 ms. Allocated memory is still 141.6 MB. Free memory was 94.6 MB in the beginning and 93.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.95 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 93.2 MB in the beginning and 173.7 MB in the end (delta: -80.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20509.43 ms. Allocated memory was 205.0 MB in the beginning and 594.5 MB in the end (delta: 389.5 MB). Free memory was 173.1 MB in the beginning and 310.3 MB in the end (delta: -137.3 MB). Peak memory consumption was 252.3 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: 20.4s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 5.5s, 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, 8.2s 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, 13.5s 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...