/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=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:20:27,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:20:27,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:20:27,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:20:27,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:20:27,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:20:27,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:20:27,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:20:27,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:20:27,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:20:27,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:20:27,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:20:27,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:20:27,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:20:27,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:20:27,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:20:27,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:20:27,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:20:27,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:20:27,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:20:27,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:20:27,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:20:27,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:20:27,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:20:27,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 02:20:27,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 02:20:27,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 02:20:27,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 02:20:27,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 02:20:27,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 02:20:27,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:20:27,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:20:27,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:20:27,478 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 02:20:27,500 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:20:27,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:20:27,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:20:27,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:20:27,503 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:20:27,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:20:27,503 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:20:27,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:20:27,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:20:27,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:20:27,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:20:27,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:20:27,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:20:27,507 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:20:27,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:20:27,508 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:20:27,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:20:27,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:20:27,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:20:27,509 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:20:27,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:20:27,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:20:27,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:20:27,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:20:27,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:20:27,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:20:27,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:20:27,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:20:27,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:20:27,511 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=1.0;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=1.0;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=1.0;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=1.0;log-additional-information=true; [2020-08-22 02:20:27,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:20:27,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:20:27,830 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:20:27,832 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:20:27,833 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:20:27,834 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-22 02:20:27,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b25e21ae/a347801e781d44c7a6653eea1d26465f/FLAG5fce12256 [2020-08-22 02:20:28,407 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:20:28,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-22 02:20:28,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b25e21ae/a347801e781d44c7a6653eea1d26465f/FLAG5fce12256 [2020-08-22 02:20:28,758 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b25e21ae/a347801e781d44c7a6653eea1d26465f [2020-08-22 02:20:28,768 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:20:28,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:20:28,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:20:28,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:20:28,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:20:28,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:20:28" (1/1) ... [2020-08-22 02:20:28,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d972e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:20:28, skipping insertion in model container [2020-08-22 02:20:28,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:20:28" (1/1) ... [2020-08-22 02:20:28,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:20:28,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:20:29,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:20:29,057 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:20:29,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:20:29,105 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:20:29,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:20:29 WrapperNode [2020-08-22 02:20:29,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:20:29,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:20:29,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:20:29,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:20:29,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:20:29" (1/1) ... [2020-08-22 02:20:29,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:20:29" (1/1) ... [2020-08-22 02:20:29,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:20:29" (1/1) ... [2020-08-22 02:20:29,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:20:29" (1/1) ... [2020-08-22 02:20:29,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:20:29" (1/1) ... [2020-08-22 02:20:29,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:20:29" (1/1) ... [2020-08-22 02:20:29,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:20:29" (1/1) ... [2020-08-22 02:20:29,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:20:29,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:20:29,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:20:29,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:20:29,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:20:29" (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 02:20:29,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:20:29,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:20:29,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 02:20:29,324 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-22 02:20:29,324 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-22 02:20:29,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:20:29,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:20:29,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 02:20:29,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 02:20:29,326 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-22 02:20:29,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 02:20:29,326 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-22 02:20:29,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 02:20:29,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:20:29,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 02:20:29,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 02:20:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:20:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:20:29,785 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:20:29,785 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-22 02:20:29,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:20:29 BoogieIcfgContainer [2020-08-22 02:20:29,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:20:29,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:20:29,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:20:29,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:20:29,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:20:28" (1/3) ... [2020-08-22 02:20:29,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337a4362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:20:29, skipping insertion in model container [2020-08-22 02:20:29,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:20:29" (2/3) ... [2020-08-22 02:20:29,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337a4362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:20:29, skipping insertion in model container [2020-08-22 02:20:29,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:20:29" (3/3) ... [2020-08-22 02:20:29,799 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-22 02:20:29,810 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:20:29,818 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:20:29,832 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:20:29,853 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:20:29,854 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:20:29,854 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:20:29,854 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:20:29,854 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:20:29,854 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:20:29,855 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:20:29,855 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:20:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-22 02:20:29,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 02:20:29,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:29,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:29,878 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:29,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:29,883 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-22 02:20:29,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:29,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529752903] [2020-08-22 02:20:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:30,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:30,070 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 02:20:30,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529752903] [2020-08-22 02:20:30,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:20:30,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 02:20:30,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853445676] [2020-08-22 02:20:30,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 02:20:30,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:30,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 02:20:30,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:20:30,098 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-22 02:20:30,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:30,474 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-22 02:20:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 02:20:30,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-22 02:20:30,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:30,491 INFO L225 Difference]: With dead ends: 150 [2020-08-22 02:20:30,492 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 02:20:30,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 02:20:30,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 02:20:30,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-22 02:20:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 02:20:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-22 02:20:30,586 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-22 02:20:30,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:30,586 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-22 02:20:30,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 02:20:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-22 02:20:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 02:20:30,588 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:30,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:30,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:20:30,589 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:30,589 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-22 02:20:30,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:30,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827644434] [2020-08-22 02:20:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:30,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:30,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827644434] [2020-08-22 02:20:30,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:30,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 02:20:30,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430269121] [2020-08-22 02:20:30,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:20:30,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:30,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:20:30,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:20:30,659 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-22 02:20:30,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:30,952 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-22 02:20:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:20:30,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 02:20:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:30,955 INFO L225 Difference]: With dead ends: 170 [2020-08-22 02:20:30,955 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 02:20:30,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:20:30,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 02:20:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-22 02:20:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 02:20:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-22 02:20:30,970 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-22 02:20:30,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:30,971 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-22 02:20:30,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:20:30,971 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-22 02:20:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 02:20:30,972 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:30,972 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:30,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:20:30,973 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:30,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-22 02:20:30,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:30,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689566021] [2020-08-22 02:20:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:31,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:31,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689566021] [2020-08-22 02:20:31,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:31,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 02:20:31,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508018034] [2020-08-22 02:20:31,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:20:31,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:31,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:20:31,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:20:31,080 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-22 02:20:31,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:31,423 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-22 02:20:31,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 02:20:31,424 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-22 02:20:31,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:31,427 INFO L225 Difference]: With dead ends: 203 [2020-08-22 02:20:31,427 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 02:20:31,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:20:31,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 02:20:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-22 02:20:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 02:20:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-22 02:20:31,442 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-22 02:20:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:31,442 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-22 02:20:31,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:20:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-22 02:20:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 02:20:31,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:31,444 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:31,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:20:31,444 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:31,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-22 02:20:31,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:31,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357357785] [2020-08-22 02:20:31,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:31,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:31,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357357785] [2020-08-22 02:20:31,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:31,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 02:20:31,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581981443] [2020-08-22 02:20:31,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:20:31,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:31,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:20:31,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:20:31,545 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-22 02:20:31,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:31,952 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-22 02:20:31,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 02:20:31,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-22 02:20:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:31,954 INFO L225 Difference]: With dead ends: 236 [2020-08-22 02:20:31,955 INFO L226 Difference]: Without dead ends: 188 [2020-08-22 02:20:31,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:20:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-22 02:20:31,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-22 02:20:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 02:20:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-22 02:20:31,968 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-22 02:20:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:31,968 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-22 02:20:31,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:20:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-22 02:20:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 02:20:31,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:31,970 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:31,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:20:31,970 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:31,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:31,971 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-22 02:20:31,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:31,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115545096] [2020-08-22 02:20:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:32,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 02:20:32,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115545096] [2020-08-22 02:20:32,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:20:32,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:20:32,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120802320] [2020-08-22 02:20:32,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:20:32,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:32,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:20:32,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:20:32,085 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-22 02:20:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:32,204 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-22 02:20:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:20:32,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-22 02:20:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:32,206 INFO L225 Difference]: With dead ends: 116 [2020-08-22 02:20:32,206 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 02:20:32,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:20:32,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 02:20:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-22 02:20:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 02:20:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-22 02:20:32,216 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-22 02:20:32,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:32,216 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-22 02:20:32,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:20:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-22 02:20:32,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 02:20:32,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:32,218 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:32,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:20:32,219 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:32,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:32,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-22 02:20:32,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:32,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095227377] [2020-08-22 02:20:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:32,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:32,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 02:20:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:32,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 02:20:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:32,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095227377] [2020-08-22 02:20:32,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:32,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 02:20:32,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681480695] [2020-08-22 02:20:32,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:20:32,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:32,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:20:32,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:20:32,355 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-22 02:20:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:32,773 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-22 02:20:32,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 02:20:32,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-22 02:20:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:32,779 INFO L225 Difference]: With dead ends: 223 [2020-08-22 02:20:32,780 INFO L226 Difference]: Without dead ends: 173 [2020-08-22 02:20:32,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:20:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-22 02:20:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-22 02:20:32,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 02:20:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-22 02:20:32,808 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-22 02:20:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:32,809 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-22 02:20:32,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:20:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-22 02:20:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 02:20:32,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:32,811 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:32,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:20:32,812 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:32,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:32,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-22 02:20:32,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:32,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756234142] [2020-08-22 02:20:32,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:32,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:32,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 02:20:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:32,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 02:20:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:32,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756234142] [2020-08-22 02:20:32,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:32,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 02:20:32,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164371800] [2020-08-22 02:20:32,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 02:20:32,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:32,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 02:20:32,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 02:20:32,978 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-22 02:20:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:33,435 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-22 02:20:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 02:20:33,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-22 02:20:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:33,438 INFO L225 Difference]: With dead ends: 246 [2020-08-22 02:20:33,438 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 02:20:33,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-22 02:20:33,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 02:20:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-22 02:20:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 02:20:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-22 02:20:33,450 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-22 02:20:33,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:33,450 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-22 02:20:33,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 02:20:33,450 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-22 02:20:33,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 02:20:33,452 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:33,452 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:33,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:20:33,453 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:33,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-22 02:20:33,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:33,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68912870] [2020-08-22 02:20:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:33,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:33,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 02:20:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:33,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 02:20:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:33,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68912870] [2020-08-22 02:20:33,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:33,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 02:20:33,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470109255] [2020-08-22 02:20:33,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 02:20:33,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:33,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 02:20:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:20:33,573 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-22 02:20:34,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:34,057 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-22 02:20:34,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 02:20:34,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-22 02:20:34,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:34,060 INFO L225 Difference]: With dead ends: 269 [2020-08-22 02:20:34,060 INFO L226 Difference]: Without dead ends: 219 [2020-08-22 02:20:34,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-08-22 02:20:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-22 02:20:34,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-22 02:20:34,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 02:20:34,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-22 02:20:34,092 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-22 02:20:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:34,092 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-22 02:20:34,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 02:20:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-22 02:20:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 02:20:34,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:34,097 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:34,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:20:34,098 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:34,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:34,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-22 02:20:34,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:34,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881662818] [2020-08-22 02:20:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:34,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:34,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 02:20:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:34,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 02:20:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:34,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881662818] [2020-08-22 02:20:34,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:34,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 02:20:34,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316055265] [2020-08-22 02:20:34,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 02:20:34,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:34,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 02:20:34,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 02:20:34,233 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-22 02:20:34,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:34,845 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-22 02:20:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 02:20:34,846 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-22 02:20:34,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:34,849 INFO L225 Difference]: With dead ends: 292 [2020-08-22 02:20:34,849 INFO L226 Difference]: Without dead ends: 242 [2020-08-22 02:20:34,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-22 02:20:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-22 02:20:34,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-22 02:20:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 02:20:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-22 02:20:34,861 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-22 02:20:34,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:34,863 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-22 02:20:34,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 02:20:34,864 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-22 02:20:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 02:20:34,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:34,870 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:34,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:20:34,871 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:34,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:34,871 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-22 02:20:34,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:34,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171528451] [2020-08-22 02:20:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:34,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:34,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 02:20:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:34,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 02:20:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:34,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171528451] [2020-08-22 02:20:34,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:34,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 02:20:34,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900188811] [2020-08-22 02:20:34,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 02:20:34,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:34,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 02:20:34,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 02:20:35,000 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-22 02:20:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:35,597 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-22 02:20:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 02:20:35,598 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-22 02:20:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:35,601 INFO L225 Difference]: With dead ends: 315 [2020-08-22 02:20:35,601 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 02:20:35,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-08-22 02:20:35,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 02:20:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-22 02:20:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 02:20:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-22 02:20:35,611 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-22 02:20:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:35,611 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-22 02:20:35,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 02:20:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-22 02:20:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 02:20:35,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:35,613 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:35,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:20:35,614 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:35,614 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-22 02:20:35,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:35,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589700248] [2020-08-22 02:20:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:35,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:35,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 02:20:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:35,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 02:20:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:35,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589700248] [2020-08-22 02:20:35,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:35,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 02:20:35,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949894631] [2020-08-22 02:20:35,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 02:20:35,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:35,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 02:20:35,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 02:20:35,779 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-22 02:20:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:36,433 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-22 02:20:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 02:20:36,434 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-22 02:20:36,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:36,436 INFO L225 Difference]: With dead ends: 338 [2020-08-22 02:20:36,436 INFO L226 Difference]: Without dead ends: 288 [2020-08-22 02:20:36,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-08-22 02:20:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-22 02:20:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-22 02:20:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 02:20:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-22 02:20:36,446 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-22 02:20:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:36,447 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-22 02:20:36,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 02:20:36,447 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-22 02:20:36,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 02:20:36,448 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:36,448 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:36,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 02:20:36,448 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:36,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-22 02:20:36,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:36,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451036784] [2020-08-22 02:20:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:36,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:36,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 02:20:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:36,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 02:20:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:36,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451036784] [2020-08-22 02:20:36,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:36,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 02:20:36,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532931311] [2020-08-22 02:20:36,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 02:20:36,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:36,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 02:20:36,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 02:20:36,608 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-22 02:20:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:37,351 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-22 02:20:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 02:20:37,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-22 02:20:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:37,354 INFO L225 Difference]: With dead ends: 361 [2020-08-22 02:20:37,354 INFO L226 Difference]: Without dead ends: 311 [2020-08-22 02:20:37,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-08-22 02:20:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-22 02:20:37,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-22 02:20:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 02:20:37,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-22 02:20:37,363 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-22 02:20:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:37,364 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-22 02:20:37,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 02:20:37,364 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-22 02:20:37,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 02:20:37,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:37,365 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:37,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 02:20:37,365 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:37,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:37,366 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-22 02:20:37,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:37,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514449996] [2020-08-22 02:20:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:37,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:37,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 02:20:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:37,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 02:20:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:37,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514449996] [2020-08-22 02:20:37,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:37,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 02:20:37,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126040006] [2020-08-22 02:20:37,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 02:20:37,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:37,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 02:20:37,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-22 02:20:37,601 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-22 02:20:38,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:38,347 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-22 02:20:38,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 02:20:38,348 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-22 02:20:38,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:38,351 INFO L225 Difference]: With dead ends: 384 [2020-08-22 02:20:38,351 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 02:20:38,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-08-22 02:20:38,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 02:20:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-22 02:20:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 02:20:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-22 02:20:38,362 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-22 02:20:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:38,363 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-22 02:20:38,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 02:20:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-22 02:20:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 02:20:38,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:38,364 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:38,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 02:20:38,364 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:38,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:38,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-22 02:20:38,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:38,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923598482] [2020-08-22 02:20:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:38,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:38,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 02:20:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:38,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 02:20:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:38,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923598482] [2020-08-22 02:20:38,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:38,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 02:20:38,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967440964] [2020-08-22 02:20:38,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 02:20:38,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:38,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 02:20:38,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-22 02:20:38,607 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-22 02:20:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:39,393 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-22 02:20:39,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 02:20:39,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-22 02:20:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:39,398 INFO L225 Difference]: With dead ends: 407 [2020-08-22 02:20:39,398 INFO L226 Difference]: Without dead ends: 357 [2020-08-22 02:20:39,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-08-22 02:20:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-22 02:20:39,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-22 02:20:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 02:20:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-22 02:20:39,408 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-22 02:20:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:39,408 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-22 02:20:39,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 02:20:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-22 02:20:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 02:20:39,409 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:39,410 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:39,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 02:20:39,410 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:39,410 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-22 02:20:39,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:39,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078376409] [2020-08-22 02:20:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:39,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:39,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 02:20:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:39,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 02:20:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:39,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078376409] [2020-08-22 02:20:39,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:39,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 02:20:39,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665612191] [2020-08-22 02:20:39,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 02:20:39,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:39,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 02:20:39,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-22 02:20:39,679 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-22 02:20:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:40,553 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-22 02:20:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 02:20:40,555 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-22 02:20:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:40,557 INFO L225 Difference]: With dead ends: 430 [2020-08-22 02:20:40,557 INFO L226 Difference]: Without dead ends: 380 [2020-08-22 02:20:40,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-08-22 02:20:40,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-22 02:20:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-22 02:20:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 02:20:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-22 02:20:40,572 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-22 02:20:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:40,573 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-22 02:20:40,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 02:20:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-22 02:20:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 02:20:40,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:40,574 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:40,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 02:20:40,574 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:40,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-22 02:20:40,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:40,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131690699] [2020-08-22 02:20:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:40,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:40,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 02:20:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:40,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 02:20:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:40,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131690699] [2020-08-22 02:20:40,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:40,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 02:20:40,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078632721] [2020-08-22 02:20:40,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 02:20:40,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:40,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 02:20:40,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-22 02:20:40,792 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-22 02:20:41,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:41,838 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-22 02:20:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 02:20:41,839 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-22 02:20:41,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:41,842 INFO L225 Difference]: With dead ends: 453 [2020-08-22 02:20:41,842 INFO L226 Difference]: Without dead ends: 403 [2020-08-22 02:20:41,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-08-22 02:20:41,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-22 02:20:41,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-22 02:20:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 02:20:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-22 02:20:41,857 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-22 02:20:41,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:41,859 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-22 02:20:41,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 02:20:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-22 02:20:41,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 02:20:41,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:41,861 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:41,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 02:20:41,862 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:41,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:41,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-22 02:20:41,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:41,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530938063] [2020-08-22 02:20:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:42,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:42,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 02:20:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:42,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 02:20:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:42,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530938063] [2020-08-22 02:20:42,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:42,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 02:20:42,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634757243] [2020-08-22 02:20:42,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 02:20:42,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:42,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 02:20:42,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-22 02:20:42,242 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-22 02:20:43,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:43,159 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-22 02:20:43,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 02:20:43,160 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-22 02:20:43,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:43,163 INFO L225 Difference]: With dead ends: 476 [2020-08-22 02:20:43,163 INFO L226 Difference]: Without dead ends: 426 [2020-08-22 02:20:43,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-08-22 02:20:43,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-22 02:20:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-22 02:20:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 02:20:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-22 02:20:43,180 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-22 02:20:43,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:43,180 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-22 02:20:43,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 02:20:43,181 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-22 02:20:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 02:20:43,182 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:43,182 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:43,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 02:20:43,182 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:43,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-22 02:20:43,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:43,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380491437] [2020-08-22 02:20:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:43,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:43,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 02:20:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:43,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 02:20:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:43,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380491437] [2020-08-22 02:20:43,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:43,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 02:20:43,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692955974] [2020-08-22 02:20:43,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 02:20:43,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:43,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 02:20:43,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-22 02:20:43,434 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-22 02:20:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:44,615 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-22 02:20:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 02:20:44,615 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-22 02:20:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:44,620 INFO L225 Difference]: With dead ends: 499 [2020-08-22 02:20:44,620 INFO L226 Difference]: Without dead ends: 449 [2020-08-22 02:20:44,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2020-08-22 02:20:44,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-22 02:20:44,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-22 02:20:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 02:20:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-22 02:20:44,639 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-22 02:20:44,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:44,640 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-22 02:20:44,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 02:20:44,640 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-22 02:20:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 02:20:44,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:44,641 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:44,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 02:20:44,641 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:44,642 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-22 02:20:44,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:44,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933251416] [2020-08-22 02:20:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:44,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:44,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 02:20:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:44,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 02:20:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:44,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933251416] [2020-08-22 02:20:44,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:44,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 02:20:44,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858094280] [2020-08-22 02:20:44,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 02:20:44,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:44,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 02:20:44,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-22 02:20:44,960 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-22 02:20:46,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:46,277 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-22 02:20:46,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 02:20:46,277 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-22 02:20:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:46,280 INFO L225 Difference]: With dead ends: 522 [2020-08-22 02:20:46,281 INFO L226 Difference]: Without dead ends: 472 [2020-08-22 02:20:46,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-08-22 02:20:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-22 02:20:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-22 02:20:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 02:20:46,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-22 02:20:46,298 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-22 02:20:46,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:46,298 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-22 02:20:46,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 02:20:46,298 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-22 02:20:46,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 02:20:46,299 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:46,299 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:46,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 02:20:46,300 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:46,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:46,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-22 02:20:46,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:46,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394527632] [2020-08-22 02:20:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:46,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:46,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 02:20:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:46,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 02:20:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:46,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394527632] [2020-08-22 02:20:46,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:46,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 02:20:46,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858464113] [2020-08-22 02:20:46,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 02:20:46,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:46,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 02:20:46,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-22 02:20:46,594 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-22 02:20:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:47,950 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-22 02:20:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 02:20:47,951 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-22 02:20:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:47,955 INFO L225 Difference]: With dead ends: 545 [2020-08-22 02:20:47,955 INFO L226 Difference]: Without dead ends: 495 [2020-08-22 02:20:47,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-08-22 02:20:47,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-22 02:20:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-22 02:20:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 02:20:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-22 02:20:47,971 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-22 02:20:47,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:47,971 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-22 02:20:47,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 02:20:47,972 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-22 02:20:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 02:20:47,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:47,973 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:47,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 02:20:47,974 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:47,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-22 02:20:47,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:47,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100454105] [2020-08-22 02:20:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:48,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:48,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 02:20:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:48,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 02:20:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:48,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100454105] [2020-08-22 02:20:48,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:48,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 02:20:48,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936653666] [2020-08-22 02:20:48,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 02:20:48,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:48,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 02:20:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-22 02:20:48,392 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-22 02:20:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:49,653 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-22 02:20:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 02:20:49,654 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-22 02:20:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:49,657 INFO L225 Difference]: With dead ends: 568 [2020-08-22 02:20:49,657 INFO L226 Difference]: Without dead ends: 518 [2020-08-22 02:20:49,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-08-22 02:20:49,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-22 02:20:49,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-22 02:20:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-22 02:20:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-22 02:20:49,669 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-22 02:20:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:49,669 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-22 02:20:49,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 02:20:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-22 02:20:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 02:20:49,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:49,670 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:49,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 02:20:49,671 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:49,671 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-22 02:20:49,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:49,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036381477] [2020-08-22 02:20:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:50,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:50,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 02:20:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:50,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 02:20:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:50,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036381477] [2020-08-22 02:20:50,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:50,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 02:20:50,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457852575] [2020-08-22 02:20:50,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 02:20:50,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:50,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 02:20:50,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-22 02:20:50,185 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-22 02:20:51,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:51,532 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-22 02:20:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 02:20:51,533 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-22 02:20:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:51,536 INFO L225 Difference]: With dead ends: 591 [2020-08-22 02:20:51,536 INFO L226 Difference]: Without dead ends: 541 [2020-08-22 02:20:51,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-08-22 02:20:51,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-22 02:20:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-22 02:20:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 02:20:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-22 02:20:51,548 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-22 02:20:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:51,549 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-22 02:20:51,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 02:20:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-22 02:20:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 02:20:51,550 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:51,550 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:51,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 02:20:51,551 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:51,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:51,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-22 02:20:51,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:51,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93633815] [2020-08-22 02:20:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:51,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:51,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 02:20:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:51,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 02:20:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:51,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93633815] [2020-08-22 02:20:51,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:51,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 02:20:51,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470425347] [2020-08-22 02:20:51,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 02:20:51,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:51,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 02:20:51,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-22 02:20:51,969 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-22 02:20:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:53,345 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-22 02:20:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 02:20:53,346 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-22 02:20:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:53,349 INFO L225 Difference]: With dead ends: 614 [2020-08-22 02:20:53,349 INFO L226 Difference]: Without dead ends: 564 [2020-08-22 02:20:53,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-08-22 02:20:53,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-22 02:20:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-22 02:20:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 02:20:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-22 02:20:53,362 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-22 02:20:53,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:53,362 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-22 02:20:53,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 02:20:53,362 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-22 02:20:53,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 02:20:53,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:53,363 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:53,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 02:20:53,364 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:53,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-22 02:20:53,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:53,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090362065] [2020-08-22 02:20:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:53,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:53,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 02:20:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:53,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 02:20:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:53,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090362065] [2020-08-22 02:20:53,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:53,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 02:20:53,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932379206] [2020-08-22 02:20:53,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 02:20:53,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:53,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 02:20:53,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-22 02:20:53,821 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-22 02:20:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:55,595 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-22 02:20:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 02:20:55,595 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-22 02:20:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:55,598 INFO L225 Difference]: With dead ends: 637 [2020-08-22 02:20:55,598 INFO L226 Difference]: Without dead ends: 587 [2020-08-22 02:20:55,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-22 02:20:55,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-22 02:20:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-22 02:20:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 02:20:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-22 02:20:55,610 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-22 02:20:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:55,611 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-22 02:20:55,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 02:20:55,611 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-22 02:20:55,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 02:20:55,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:55,612 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:55,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 02:20:55,612 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:55,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:55,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-22 02:20:55,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:55,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089524759] [2020-08-22 02:20:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:56,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:56,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 02:20:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:56,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 02:20:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:56,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089524759] [2020-08-22 02:20:56,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:56,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 02:20:56,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774501135] [2020-08-22 02:20:56,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 02:20:56,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:56,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 02:20:56,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-22 02:20:56,075 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-22 02:20:57,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:20:57,886 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-22 02:20:57,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 02:20:57,887 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-22 02:20:57,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:20:57,890 INFO L225 Difference]: With dead ends: 660 [2020-08-22 02:20:57,890 INFO L226 Difference]: Without dead ends: 610 [2020-08-22 02:20:57,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-22 02:20:57,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-22 02:20:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-22 02:20:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 02:20:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-22 02:20:57,902 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-22 02:20:57,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:20:57,902 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-22 02:20:57,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 02:20:57,902 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-22 02:20:57,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 02:20:57,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:20:57,903 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:20:57,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 02:20:57,904 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:20:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:20:57,904 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-22 02:20:57,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:20:57,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408035676] [2020-08-22 02:20:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:20:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:58,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:20:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:58,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 02:20:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:58,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 02:20:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:20:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:20:58,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408035676] [2020-08-22 02:20:58,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:20:58,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 02:20:58,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242411987] [2020-08-22 02:20:58,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 02:20:58,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:20:58,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 02:20:58,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-22 02:20:58,401 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-22 02:21:00,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:00,430 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-22 02:21:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 02:21:00,430 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-22 02:21:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:00,436 INFO L225 Difference]: With dead ends: 683 [2020-08-22 02:21:00,436 INFO L226 Difference]: Without dead ends: 633 [2020-08-22 02:21:00,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-22 02:21:00,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-22 02:21:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-22 02:21:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 02:21:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-22 02:21:00,455 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-22 02:21:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:00,456 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-22 02:21:00,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 02:21:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-22 02:21:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 02:21:00,457 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:00,458 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:00,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 02:21:00,458 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:00,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:00,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-22 02:21:00,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:00,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607578895] [2020-08-22 02:21:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:01,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:01,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 02:21:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:01,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 02:21:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:21:01,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607578895] [2020-08-22 02:21:01,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:21:01,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 02:21:01,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508822046] [2020-08-22 02:21:01,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 02:21:01,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:01,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 02:21:01,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-22 02:21:01,177 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-22 02:21:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:03,943 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-22 02:21:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 02:21:03,944 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-22 02:21:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:03,949 INFO L225 Difference]: With dead ends: 706 [2020-08-22 02:21:03,949 INFO L226 Difference]: Without dead ends: 656 [2020-08-22 02:21:03,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-08-22 02:21:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-22 02:21:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-22 02:21:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-22 02:21:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-22 02:21:03,968 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-22 02:21:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:03,968 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-22 02:21:03,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 02:21:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-22 02:21:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 02:21:03,970 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:03,970 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:03,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 02:21:03,971 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:03,973 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-22 02:21:03,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:03,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464818147] [2020-08-22 02:21:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:04,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:04,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 02:21:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:04,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 02:21:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:21:04,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464818147] [2020-08-22 02:21:04,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:21:04,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 02:21:04,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608571834] [2020-08-22 02:21:04,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 02:21:04,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:04,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 02:21:04,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-22 02:21:04,503 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-22 02:21:06,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:06,702 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-22 02:21:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 02:21:06,703 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-22 02:21:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:06,706 INFO L225 Difference]: With dead ends: 729 [2020-08-22 02:21:06,707 INFO L226 Difference]: Without dead ends: 679 [2020-08-22 02:21:06,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 02:21:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-22 02:21:06,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-22 02:21:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 02:21:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-22 02:21:06,718 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-22 02:21:06,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:06,718 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-22 02:21:06,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 02:21:06,719 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-22 02:21:06,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 02:21:06,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:06,720 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:06,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 02:21:06,720 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:06,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:06,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-22 02:21:06,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:06,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939648803] [2020-08-22 02:21:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:07,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:07,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 02:21:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:07,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 02:21:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:21:07,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939648803] [2020-08-22 02:21:07,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:21:07,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 02:21:07,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848566465] [2020-08-22 02:21:07,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 02:21:07,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:07,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 02:21:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-22 02:21:07,292 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-22 02:21:09,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:09,158 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-22 02:21:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 02:21:09,159 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-22 02:21:09,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:09,164 INFO L225 Difference]: With dead ends: 752 [2020-08-22 02:21:09,164 INFO L226 Difference]: Without dead ends: 702 [2020-08-22 02:21:09,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 02:21:09,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-22 02:21:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-22 02:21:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 02:21:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-22 02:21:09,180 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-22 02:21:09,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:09,182 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-22 02:21:09,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 02:21:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-22 02:21:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 02:21:09,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:09,184 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:09,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 02:21:09,185 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:09,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:09,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-22 02:21:09,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:09,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065661890] [2020-08-22 02:21:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:09,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:09,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 02:21:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:09,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 02:21:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-22 02:21:09,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065661890] [2020-08-22 02:21:09,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:21:09,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:21:09,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288253523] [2020-08-22 02:21:09,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:21:09,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:09,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:21:09,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:21:09,276 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-22 02:21:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:09,418 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-22 02:21:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 02:21:09,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-22 02:21:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:09,420 INFO L225 Difference]: With dead ends: 177 [2020-08-22 02:21:09,420 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 02:21:09,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 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 02:21:09,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 02:21:09,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-22 02:21:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 02:21:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-22 02:21:09,426 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-22 02:21:09,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:09,426 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-22 02:21:09,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:21:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-22 02:21:09,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 02:21:09,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:09,428 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:09,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 02:21:09,428 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-22 02:21:09,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:09,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854539162] [2020-08-22 02:21:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:09,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:09,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 02:21:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:09,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 02:21:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-22 02:21:09,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854539162] [2020-08-22 02:21:09,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:21:09,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 02:21:09,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157706676] [2020-08-22 02:21:09,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:21:09,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:09,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:21:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:21:09,520 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-22 02:21:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:09,691 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-22 02:21:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 02:21:09,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-22 02:21:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:09,693 INFO L225 Difference]: With dead ends: 200 [2020-08-22 02:21:09,694 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 02:21:09,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:21:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 02:21:09,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-22 02:21:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 02:21:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-22 02:21:09,703 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-22 02:21:09,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:09,703 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-22 02:21:09,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:21:09,704 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-22 02:21:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 02:21:09,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:09,705 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:09,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 02:21:09,706 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:09,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-22 02:21:09,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:09,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312138084] [2020-08-22 02:21:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:09,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:09,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 02:21:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:09,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 02:21:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-22 02:21:09,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312138084] [2020-08-22 02:21:09,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:21:09,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 02:21:09,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734162008] [2020-08-22 02:21:09,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:21:09,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:21:09,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:21:09,815 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-22 02:21:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:09,958 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-22 02:21:09,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 02:21:09,958 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-22 02:21:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:09,959 INFO L225 Difference]: With dead ends: 187 [2020-08-22 02:21:09,960 INFO L226 Difference]: Without dead ends: 139 [2020-08-22 02:21:09,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 02:21:09,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-22 02:21:09,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-22 02:21:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 02:21:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-22 02:21:09,966 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-22 02:21:09,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:09,967 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-22 02:21:09,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:21:09,967 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-22 02:21:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 02:21:09,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:21:09,968 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:21:09,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 02:21:09,968 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:21:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:21:09,969 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-22 02:21:09,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:21:09,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346836118] [2020-08-22 02:21:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:21:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:10,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:21:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:10,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 02:21:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:10,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 02:21:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:21:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-22 02:21:10,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346836118] [2020-08-22 02:21:10,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:21:10,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 02:21:10,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354348325] [2020-08-22 02:21:10,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:21:10,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:21:10,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:21:10,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:21:10,064 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-22 02:21:10,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:21:10,190 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-22 02:21:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 02:21:10,190 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-22 02:21:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:21:10,191 INFO L225 Difference]: With dead ends: 157 [2020-08-22 02:21:10,191 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 02:21:10,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:21:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 02:21:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 02:21:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 02:21:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 02:21:10,192 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-22 02:21:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:21:10,192 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 02:21:10,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:21:10,192 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 02:21:10,192 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 02:21:10,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 02:21:10,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 02:21:10,445 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-22 02:21:10,446 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-22 02:21:10,446 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-22 02:21:10,446 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-22 02:21:10,446 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-22 02:21:10,446 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (and (<= 0 elem_exists_~i~0) (= elem_exists_~size |elem_exists_#in~size|)) [2020-08-22 02:21:10,446 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-22 02:21:10,446 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-22 02:21:10,447 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-22 02:21:10,447 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 02:21:10,447 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-22 02:21:10,447 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-22 02:21:10,447 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-22 02:21:10,447 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 02:21:10,447 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 02:21:10,447 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 02:21:10,448 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 02:21:10,448 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-22 02:21:10,448 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-22 02:21:10,448 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-22 02:21:10,448 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-22 02:21:10,448 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 02:21:10,448 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-22 02:21:10,448 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 02:21:10,449 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-22 02:21:10,449 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-22 02:21:10,449 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 02:21:10,449 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-22 02:21:10,449 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-22 02:21:10,449 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-22 02:21:10,449 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-22 02:21:10,449 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-22 02:21:10,449 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-22 02:21:10,450 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-22 02:21:10,450 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-22 02:21:10,450 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-22 02:21:10,450 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-22 02:21:10,450 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-22 02:21:10,450 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-22 02:21:10,450 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-22 02:21:10,450 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-22 02:21:10,451 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-22 02:21:10,451 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 02:21:10,451 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-22 02:21:10,451 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 02:21:10,451 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-22 02:21:10,451 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-22 02:21:10,451 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-22 02:21:10,451 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-22 02:21:10,452 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 02:21:10,452 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-22 02:21:10,452 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-22 02:21:10,452 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-22 02:21:10,452 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-22 02:21:10,452 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-22 02:21:10,452 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-22 02:21:10,452 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-22 02:21:10,453 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-22 02:21:10,453 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-22 02:21:10,453 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-22 02:21:10,453 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-22 02:21:10,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 02:21:10 BoogieIcfgContainer [2020-08-22 02:21:10,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 02:21:10,476 INFO L168 Benchmark]: Toolchain (without parser) took 41705.54 ms. Allocated memory was 141.6 MB in the beginning and 456.1 MB in the end (delta: 314.6 MB). Free memory was 104.9 MB in the beginning and 247.1 MB in the end (delta: -142.1 MB). Peak memory consumption was 172.4 MB. Max. memory is 7.1 GB. [2020-08-22 02:21:10,476 INFO L168 Benchmark]: CDTParser took 0.87 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 02:21:10,477 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.92 ms. Allocated memory is still 141.6 MB. Free memory was 104.5 MB in the beginning and 93.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-22 02:21:10,477 INFO L168 Benchmark]: Boogie Preprocessor took 145.38 ms. Allocated memory was 141.6 MB in the beginning and 202.9 MB in the end (delta: 61.3 MB). Free memory was 93.5 MB in the beginning and 180.4 MB in the end (delta: -86.8 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-22 02:21:10,478 INFO L168 Benchmark]: RCFGBuilder took 538.42 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 156.8 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-08-22 02:21:10,478 INFO L168 Benchmark]: TraceAbstraction took 40681.66 ms. Allocated memory was 202.9 MB in the beginning and 456.1 MB in the end (delta: 253.2 MB). Free memory was 156.1 MB in the beginning and 247.1 MB in the end (delta: -90.9 MB). Peak memory consumption was 162.3 MB. Max. memory is 7.1 GB. [2020-08-22 02:21:10,480 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.87 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 334.92 ms. Allocated memory is still 141.6 MB. Free memory was 104.5 MB in the beginning and 93.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.38 ms. Allocated memory was 141.6 MB in the beginning and 202.9 MB in the end (delta: 61.3 MB). Free memory was 93.5 MB in the beginning and 180.4 MB in the end (delta: -86.8 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 538.42 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 156.8 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 40681.66 ms. Allocated memory was 202.9 MB in the beginning and 456.1 MB in the end (delta: 253.2 MB). Free memory was 156.1 MB in the beginning and 247.1 MB in the end (delta: -90.9 MB). Peak memory consumption was 162.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n == 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 <= i && size == \old(size) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 40.3s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 30.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 33 MinimizatonAttempts, 8700 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 250 PreInvPairs, 290 NumberOfFragments, 81 HoareAnnotationTreeSize, 250 FomulaSimplifications, 452 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 22 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 1992 NumberOfCodeBlocks, 1992 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1959 ConstructedInterpolants, 0 QuantifiedInterpolants, 278362 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 3160/10091 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 correct! Received shutdown request...