/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:49:55,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:49:55,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:49:55,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:49:55,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:49:55,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:49:55,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:49:55,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:49:55,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:49:55,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:49:55,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:49:55,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:49:55,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:49:55,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:49:55,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:49:55,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:49:55,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:49:55,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:49:55,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:49:55,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:49:55,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:49:55,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:49:55,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:49:55,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:49:55,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:49:55,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:49:55,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:49:55,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:49:55,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:49:55,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 22:49:55,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 22:49:55,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 22:49:55,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 22:49:55,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 22:49:55,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 22:49:55,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 22:49:55,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 22:49:55,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 22:49:55,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:49:55,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:49:55,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:49:55,875 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 [2020-08-18 22:49:55,899 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:49:55,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:49:55,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:49:55,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:49:55,901 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:49:55,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:49:55,902 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:49:55,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:49:55,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:49:55,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:49:55,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:49:55,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:49:55,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:49:55,903 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:49:55,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:49:55,903 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:49:55,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:49:55,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:49:55,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:49:55,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:49:55,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:49:55,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:49:55,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:49:55,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:49:55,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:49:55,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:49:55,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:49:55,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:49:55,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:49:55,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:49:56,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:49:56,221 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:49:56,227 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:49:56,230 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:49:56,231 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:49:56,232 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-08-18 22:49:56,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8060992db/a861d367a9004bdda9559732df958bb2/FLAG3f839f021 [2020-08-18 22:49:56,751 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:49:56,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-08-18 22:49:56,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8060992db/a861d367a9004bdda9559732df958bb2/FLAG3f839f021 [2020-08-18 22:49:57,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8060992db/a861d367a9004bdda9559732df958bb2 [2020-08-18 22:49:57,091 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:49:57,092 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:49:57,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:49:57,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:49:57,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:49:57,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:49:57" (1/1) ... [2020-08-18 22:49:57,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc80312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:57, skipping insertion in model container [2020-08-18 22:49:57,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:49:57" (1/1) ... [2020-08-18 22:49:57,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:49:57,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:49:57,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:49:57,327 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:49:57,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:49:57,359 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:49:57,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:57 WrapperNode [2020-08-18 22:49:57,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:49:57,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:49:57,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:49:57,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:49:57,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:57" (1/1) ... [2020-08-18 22:49:57,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:57" (1/1) ... [2020-08-18 22:49:57,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:57" (1/1) ... [2020-08-18 22:49:57,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:57" (1/1) ... [2020-08-18 22:49:57,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:57" (1/1) ... [2020-08-18 22:49:57,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:57" (1/1) ... [2020-08-18 22:49:57,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:57" (1/1) ... [2020-08-18 22:49:57,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:49:57,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:49:57,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:49:57,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:49:57,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:57" (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 [2020-08-18 22:49:57,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:49:57,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:49:57,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 22:49:57,550 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-18 22:49:57,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:49:57,550 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 22:49:57,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:49:57,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:49:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-18 22:49:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 22:49:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 22:49:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:49:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 22:49:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 22:49:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 22:49:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:49:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:49:58,063 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:49:58,064 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 22:49:58,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:49:58 BoogieIcfgContainer [2020-08-18 22:49:58,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:49:58,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:49:58,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:49:58,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:49:58,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:49:57" (1/3) ... [2020-08-18 22:49:58,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730dfae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:49:58, skipping insertion in model container [2020-08-18 22:49:58,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:57" (2/3) ... [2020-08-18 22:49:58,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730dfae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:49:58, skipping insertion in model container [2020-08-18 22:49:58,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:49:58" (3/3) ... [2020-08-18 22:49:58,079 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-08-18 22:49:58,088 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:49:58,096 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:49:58,111 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:49:58,135 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:49:58,135 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:49:58,136 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:49:58,136 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:49:58,136 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:49:58,136 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:49:58,136 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:49:58,136 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:49:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 22:49:58,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:49:58,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:49:58,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:49:58,164 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:49:58,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:49:58,171 INFO L82 PathProgramCache]: Analyzing trace with hash -850547107, now seen corresponding path program 1 times [2020-08-18 22:49:58,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:49:58,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756343025] [2020-08-18 22:49:58,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:49:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:58,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:49:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:58,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:49:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:49:58,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756343025] [2020-08-18 22:49:58,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:49:58,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 22:49:58,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325761324] [2020-08-18 22:49:58,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 22:49:58,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:49:58,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 22:49:58,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 22:49:58,433 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-08-18 22:49:58,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:49:58,633 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-08-18 22:49:58,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:49:58,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-08-18 22:49:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:49:58,651 INFO L225 Difference]: With dead ends: 59 [2020-08-18 22:49:58,652 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 22:49:58,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:49:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 22:49:58,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-08-18 22:49:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 22:49:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-18 22:49:58,714 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-08-18 22:49:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:49:58,716 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-18 22:49:58,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 22:49:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-18 22:49:58,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:49:58,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:49:58,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:49:58,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:49:58,719 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:49:58,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:49:58,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1453375688, now seen corresponding path program 1 times [2020-08-18 22:49:58,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:49:58,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458431072] [2020-08-18 22:49:58,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:49:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:58,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:49:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:58,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:49:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:49:58,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458431072] [2020-08-18 22:49:58,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:49:58,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:49:58,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721528908] [2020-08-18 22:49:58,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:49:58,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:49:58,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:49:58,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:49:58,949 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-18 22:49:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:49:59,156 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-18 22:49:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:49:59,157 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-18 22:49:59,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:49:59,172 INFO L225 Difference]: With dead ends: 48 [2020-08-18 22:49:59,172 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 22:49:59,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:49:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 22:49:59,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-18 22:49:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 22:49:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-18 22:49:59,184 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-08-18 22:49:59,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:49:59,184 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-18 22:49:59,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:49:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-18 22:49:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:49:59,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:49:59,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:49:59,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:49:59,187 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:49:59,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:49:59,187 INFO L82 PathProgramCache]: Analyzing trace with hash -169907062, now seen corresponding path program 1 times [2020-08-18 22:49:59,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:49:59,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871724016] [2020-08-18 22:49:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:49:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:59,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:49:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:59,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:49:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:49:59,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871724016] [2020-08-18 22:49:59,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:49:59,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:49:59,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811192831] [2020-08-18 22:49:59,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:49:59,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:49:59,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:49:59,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:49:59,427 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-08-18 22:49:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:49:59,596 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-08-18 22:49:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:49:59,597 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-18 22:49:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:49:59,598 INFO L225 Difference]: With dead ends: 50 [2020-08-18 22:49:59,598 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 22:49:59,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:49:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 22:49:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-18 22:49:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 22:49:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-18 22:49:59,606 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-18 22:49:59,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:49:59,606 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-18 22:49:59,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:49:59,607 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-18 22:49:59,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 22:49:59,608 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:49:59,608 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:49:59,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:49:59,608 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:49:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:49:59,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1071501364, now seen corresponding path program 2 times [2020-08-18 22:49:59,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:49:59,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27352943] [2020-08-18 22:49:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:49:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:59,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:49:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:59,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:49:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:49:59,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27352943] [2020-08-18 22:49:59,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:49:59,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 22:49:59,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066642617] [2020-08-18 22:49:59,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:49:59,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:49:59,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:49:59,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:49:59,855 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-08-18 22:50:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:00,068 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-08-18 22:50:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:50:00,068 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-18 22:50:00,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:00,069 INFO L225 Difference]: With dead ends: 52 [2020-08-18 22:50:00,070 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 22:50:00,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:50:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 22:50:00,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-18 22:50:00,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 22:50:00,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-18 22:50:00,084 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-18 22:50:00,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:00,085 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-18 22:50:00,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:50:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-18 22:50:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 22:50:00,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:00,090 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:00,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:50:00,090 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:00,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:00,091 INFO L82 PathProgramCache]: Analyzing trace with hash 79768206, now seen corresponding path program 3 times [2020-08-18 22:50:00,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:00,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783634468] [2020-08-18 22:50:00,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:00,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:00,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:50:00,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783634468] [2020-08-18 22:50:00,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:00,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:50:00,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15301947] [2020-08-18 22:50:00,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:50:00,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:00,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:50:00,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:50:00,438 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-08-18 22:50:00,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:00,637 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-08-18 22:50:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:50:00,638 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-18 22:50:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:00,642 INFO L225 Difference]: With dead ends: 54 [2020-08-18 22:50:00,642 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 22:50:00,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:50:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 22:50:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-18 22:50:00,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-18 22:50:00,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-18 22:50:00,652 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-08-18 22:50:00,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:00,652 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-18 22:50:00,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:50:00,653 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-18 22:50:00,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 22:50:00,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:00,657 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] [2020-08-18 22:50:00,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:50:00,657 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:00,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:00,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1651737392, now seen corresponding path program 4 times [2020-08-18 22:50:00,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:00,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011543527] [2020-08-18 22:50:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:00,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:00,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:50:00,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011543527] [2020-08-18 22:50:00,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:00,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:50:00,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332591148] [2020-08-18 22:50:00,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:50:00,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:00,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:50:00,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:50:00,970 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-08-18 22:50:01,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:01,154 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-08-18 22:50:01,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:50:01,155 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-18 22:50:01,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:01,156 INFO L225 Difference]: With dead ends: 56 [2020-08-18 22:50:01,156 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 22:50:01,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:50:01,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 22:50:01,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-18 22:50:01,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 22:50:01,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-18 22:50:01,167 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-08-18 22:50:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:01,168 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-18 22:50:01,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:50:01,168 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-18 22:50:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 22:50:01,169 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:01,170 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] [2020-08-18 22:50:01,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:50:01,170 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:01,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:01,171 INFO L82 PathProgramCache]: Analyzing trace with hash 818693778, now seen corresponding path program 5 times [2020-08-18 22:50:01,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:01,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176583063] [2020-08-18 22:50:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:01,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:01,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:50:01,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176583063] [2020-08-18 22:50:01,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:01,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:50:01,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263865450] [2020-08-18 22:50:01,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:50:01,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:50:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:50:01,532 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-08-18 22:50:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:01,739 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-08-18 22:50:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 22:50:01,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-18 22:50:01,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:01,741 INFO L225 Difference]: With dead ends: 58 [2020-08-18 22:50:01,741 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 22:50:01,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:50:01,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 22:50:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-18 22:50:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 22:50:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-08-18 22:50:01,749 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-08-18 22:50:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:01,749 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-08-18 22:50:01,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:50:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-08-18 22:50:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 22:50:01,750 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:01,751 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] [2020-08-18 22:50:01,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:50:01,751 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:01,752 INFO L82 PathProgramCache]: Analyzing trace with hash -213866540, now seen corresponding path program 6 times [2020-08-18 22:50:01,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:01,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908444154] [2020-08-18 22:50:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:01,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:01,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:50:02,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908444154] [2020-08-18 22:50:02,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:02,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 22:50:02,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499350583] [2020-08-18 22:50:02,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 22:50:02,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:02,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 22:50:02,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:50:02,099 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-08-18 22:50:02,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:02,342 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-08-18 22:50:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:50:02,343 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-18 22:50:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:02,344 INFO L225 Difference]: With dead ends: 60 [2020-08-18 22:50:02,344 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 22:50:02,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:50:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 22:50:02,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-18 22:50:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 22:50:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-18 22:50:02,351 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-08-18 22:50:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:02,351 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-18 22:50:02,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 22:50:02,352 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-18 22:50:02,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 22:50:02,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:02,353 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] [2020-08-18 22:50:02,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:50:02,353 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:02,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:02,354 INFO L82 PathProgramCache]: Analyzing trace with hash -366886762, now seen corresponding path program 7 times [2020-08-18 22:50:02,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:02,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740916941] [2020-08-18 22:50:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:02,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:02,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:50:02,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740916941] [2020-08-18 22:50:02,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:02,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 22:50:02,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427204427] [2020-08-18 22:50:02,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 22:50:02,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:02,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 22:50:02,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:50:02,714 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-08-18 22:50:02,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:02,934 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-18 22:50:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 22:50:02,935 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-08-18 22:50:02,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:02,936 INFO L225 Difference]: With dead ends: 62 [2020-08-18 22:50:02,936 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 22:50:02,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:50:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 22:50:02,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-18 22:50:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 22:50:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-08-18 22:50:02,942 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-08-18 22:50:02,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:02,942 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-08-18 22:50:02,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 22:50:02,943 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-08-18 22:50:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 22:50:02,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:02,944 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] [2020-08-18 22:50:02,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:50:02,944 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:02,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1390432040, now seen corresponding path program 8 times [2020-08-18 22:50:02,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:02,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891229758] [2020-08-18 22:50:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:02,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:02,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:50:03,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891229758] [2020-08-18 22:50:03,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:03,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 22:50:03,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508952946] [2020-08-18 22:50:03,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 22:50:03,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:03,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 22:50:03,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:50:03,364 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-08-18 22:50:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:03,600 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-08-18 22:50:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 22:50:03,600 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-08-18 22:50:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:03,601 INFO L225 Difference]: With dead ends: 64 [2020-08-18 22:50:03,601 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 22:50:03,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:50:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 22:50:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-18 22:50:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 22:50:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-08-18 22:50:03,608 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-08-18 22:50:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:03,608 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-08-18 22:50:03,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 22:50:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-08-18 22:50:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 22:50:03,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:03,610 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] [2020-08-18 22:50:03,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:50:03,610 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:03,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1469933414, now seen corresponding path program 9 times [2020-08-18 22:50:03,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:03,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027594874] [2020-08-18 22:50:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:03,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:03,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-18 22:50:03,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027594874] [2020-08-18 22:50:03,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:50:03,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:50:03,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60147401] [2020-08-18 22:50:03,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:50:03,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:03,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:50:03,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:50:03,686 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2020-08-18 22:50:03,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:03,781 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-08-18 22:50:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 22:50:03,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-18 22:50:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:03,783 INFO L225 Difference]: With dead ends: 65 [2020-08-18 22:50:03,783 INFO L226 Difference]: Without dead ends: 53 [2020-08-18 22:50:03,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:50:03,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-18 22:50:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-08-18 22:50:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 22:50:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-18 22:50:03,811 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-08-18 22:50:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:03,812 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-18 22:50:03,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:50:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-18 22:50:03,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 22:50:03,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:03,813 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] [2020-08-18 22:50:03,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:50:03,814 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:03,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1568016950, now seen corresponding path program 1 times [2020-08-18 22:50:03,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:03,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065810911] [2020-08-18 22:50:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:03,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:03,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-18 22:50:03,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065810911] [2020-08-18 22:50:03,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:03,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 22:50:03,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625634599] [2020-08-18 22:50:03,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:50:03,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:03,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:50:03,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:50:03,895 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-08-18 22:50:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:03,995 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-08-18 22:50:03,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:50:03,995 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-08-18 22:50:03,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:03,997 INFO L225 Difference]: With dead ends: 73 [2020-08-18 22:50:03,997 INFO L226 Difference]: Without dead ends: 61 [2020-08-18 22:50:03,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:50:03,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-18 22:50:04,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-08-18 22:50:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-18 22:50:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-08-18 22:50:04,004 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 41 [2020-08-18 22:50:04,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:04,004 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-08-18 22:50:04,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:50:04,005 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-08-18 22:50:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 22:50:04,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:04,006 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:04,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:50:04,006 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:04,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:04,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1298090650, now seen corresponding path program 2 times [2020-08-18 22:50:04,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:04,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186161089] [2020-08-18 22:50:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:04,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:04,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-08-18 22:50:04,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186161089] [2020-08-18 22:50:04,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:50:04,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:50:04,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484983268] [2020-08-18 22:50:04,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:50:04,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:04,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:50:04,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:50:04,087 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2020-08-18 22:50:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:04,182 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-08-18 22:50:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 22:50:04,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-08-18 22:50:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:04,183 INFO L225 Difference]: With dead ends: 69 [2020-08-18 22:50:04,184 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 22:50:04,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:50:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 22:50:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-18 22:50:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-18 22:50:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-08-18 22:50:04,190 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2020-08-18 22:50:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:04,190 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-08-18 22:50:04,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:50:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-08-18 22:50:04,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 22:50:04,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:04,192 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:04,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 22:50:04,192 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:04,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:04,192 INFO L82 PathProgramCache]: Analyzing trace with hash 318257626, now seen corresponding path program 1 times [2020-08-18 22:50:04,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:04,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038897162] [2020-08-18 22:50:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:04,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:04,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:04,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038897162] [2020-08-18 22:50:04,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:04,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 22:50:04,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884520572] [2020-08-18 22:50:04,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 22:50:04,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:04,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 22:50:04,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:50:04,686 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 15 states. [2020-08-18 22:50:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:04,891 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-08-18 22:50:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 22:50:04,892 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-08-18 22:50:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:04,893 INFO L225 Difference]: With dead ends: 74 [2020-08-18 22:50:04,893 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 22:50:04,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:50:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 22:50:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-18 22:50:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 22:50:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-08-18 22:50:04,902 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2020-08-18 22:50:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:04,902 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-08-18 22:50:04,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 22:50:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-08-18 22:50:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 22:50:04,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:04,903 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:04,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 22:50:04,904 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:04,904 INFO L82 PathProgramCache]: Analyzing trace with hash -935313508, now seen corresponding path program 2 times [2020-08-18 22:50:04,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:04,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601948635] [2020-08-18 22:50:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:04,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:04,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:05,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601948635] [2020-08-18 22:50:05,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:05,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 22:50:05,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762749428] [2020-08-18 22:50:05,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 22:50:05,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:05,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 22:50:05,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:50:05,426 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 16 states. [2020-08-18 22:50:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:05,661 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-08-18 22:50:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 22:50:05,661 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-08-18 22:50:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:05,662 INFO L225 Difference]: With dead ends: 76 [2020-08-18 22:50:05,662 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 22:50:05,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2020-08-18 22:50:05,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 22:50:05,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-18 22:50:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-18 22:50:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-08-18 22:50:05,668 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2020-08-18 22:50:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:05,669 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-08-18 22:50:05,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 22:50:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-08-18 22:50:05,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 22:50:05,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:05,670 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:05,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 22:50:05,671 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:05,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:05,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1268636894, now seen corresponding path program 3 times [2020-08-18 22:50:05,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:05,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446106406] [2020-08-18 22:50:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:05,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:05,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:06,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446106406] [2020-08-18 22:50:06,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:06,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 22:50:06,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284607599] [2020-08-18 22:50:06,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 22:50:06,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:06,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 22:50:06,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:50:06,227 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2020-08-18 22:50:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:06,490 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-08-18 22:50:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 22:50:06,491 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-08-18 22:50:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:06,491 INFO L225 Difference]: With dead ends: 78 [2020-08-18 22:50:06,491 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 22:50:06,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2020-08-18 22:50:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 22:50:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-18 22:50:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 22:50:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-08-18 22:50:06,513 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-08-18 22:50:06,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:06,513 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-08-18 22:50:06,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 22:50:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-08-18 22:50:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 22:50:06,514 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:06,514 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:06,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 22:50:06,515 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:06,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1846096288, now seen corresponding path program 4 times [2020-08-18 22:50:06,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:06,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110586708] [2020-08-18 22:50:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:06,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:06,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:07,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110586708] [2020-08-18 22:50:07,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:07,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 22:50:07,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082150502] [2020-08-18 22:50:07,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 22:50:07,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:07,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 22:50:07,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:50:07,099 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 18 states. [2020-08-18 22:50:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:07,352 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-08-18 22:50:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 22:50:07,352 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-18 22:50:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:07,353 INFO L225 Difference]: With dead ends: 80 [2020-08-18 22:50:07,353 INFO L226 Difference]: Without dead ends: 58 [2020-08-18 22:50:07,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2020-08-18 22:50:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-18 22:50:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-18 22:50:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 22:50:07,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-08-18 22:50:07,360 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-08-18 22:50:07,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:07,360 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-08-18 22:50:07,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 22:50:07,361 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-08-18 22:50:07,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 22:50:07,361 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:07,361 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:07,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 22:50:07,362 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:07,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:07,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1561174558, now seen corresponding path program 5 times [2020-08-18 22:50:07,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:07,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629834021] [2020-08-18 22:50:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:07,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:07,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:08,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629834021] [2020-08-18 22:50:08,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:08,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 22:50:08,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896777576] [2020-08-18 22:50:08,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 22:50:08,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:08,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 22:50:08,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-08-18 22:50:08,013 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 19 states. [2020-08-18 22:50:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:08,278 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-08-18 22:50:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 22:50:08,279 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-08-18 22:50:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:08,280 INFO L225 Difference]: With dead ends: 82 [2020-08-18 22:50:08,280 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 22:50:08,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2020-08-18 22:50:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 22:50:08,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-08-18 22:50:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-18 22:50:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-08-18 22:50:08,285 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-08-18 22:50:08,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:08,286 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-08-18 22:50:08,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 22:50:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-08-18 22:50:08,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 22:50:08,287 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:08,287 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:08,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 22:50:08,287 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:08,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:08,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1111589284, now seen corresponding path program 6 times [2020-08-18 22:50:08,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:08,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000525156] [2020-08-18 22:50:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:08,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:08,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:08,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000525156] [2020-08-18 22:50:08,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:08,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 22:50:08,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593134115] [2020-08-18 22:50:08,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 22:50:08,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:08,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 22:50:08,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-08-18 22:50:08,958 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 20 states. [2020-08-18 22:50:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:09,255 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-08-18 22:50:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 22:50:09,256 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-08-18 22:50:09,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:09,257 INFO L225 Difference]: With dead ends: 84 [2020-08-18 22:50:09,257 INFO L226 Difference]: Without dead ends: 62 [2020-08-18 22:50:09,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2020-08-18 22:50:09,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-18 22:50:09,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-08-18 22:50:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-18 22:50:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-08-18 22:50:09,263 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-08-18 22:50:09,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:09,264 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-08-18 22:50:09,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 22:50:09,264 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-08-18 22:50:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 22:50:09,265 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:09,265 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:09,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 22:50:09,265 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:09,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:09,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1247198438, now seen corresponding path program 7 times [2020-08-18 22:50:09,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:09,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376908548] [2020-08-18 22:50:09,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:09,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:09,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:10,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376908548] [2020-08-18 22:50:10,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:10,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 22:50:10,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827648112] [2020-08-18 22:50:10,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 22:50:10,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:10,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 22:50:10,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-08-18 22:50:10,002 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 21 states. [2020-08-18 22:50:10,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:10,210 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-08-18 22:50:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 22:50:10,211 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-08-18 22:50:10,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:10,212 INFO L225 Difference]: With dead ends: 86 [2020-08-18 22:50:10,212 INFO L226 Difference]: Without dead ends: 64 [2020-08-18 22:50:10,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2020-08-18 22:50:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-18 22:50:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-08-18 22:50:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 22:50:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-08-18 22:50:10,218 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-08-18 22:50:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:10,219 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-08-18 22:50:10,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 22:50:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-08-18 22:50:10,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 22:50:10,220 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:10,220 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:10,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 22:50:10,220 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:10,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:10,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1576390744, now seen corresponding path program 8 times [2020-08-18 22:50:10,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:10,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24861456] [2020-08-18 22:50:10,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:10,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:10,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:11,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24861456] [2020-08-18 22:50:11,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:11,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 22:50:11,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73467973] [2020-08-18 22:50:11,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 22:50:11,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:11,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 22:50:11,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-08-18 22:50:11,243 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 22 states. [2020-08-18 22:50:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:11,613 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-08-18 22:50:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 22:50:11,613 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-18 22:50:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:11,615 INFO L225 Difference]: With dead ends: 88 [2020-08-18 22:50:11,615 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 22:50:11,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2020-08-18 22:50:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 22:50:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-08-18 22:50:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-18 22:50:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-08-18 22:50:11,622 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2020-08-18 22:50:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:11,622 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-08-18 22:50:11,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 22:50:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-08-18 22:50:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 22:50:11,623 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:11,623 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:11,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 22:50:11,624 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:11,624 INFO L82 PathProgramCache]: Analyzing trace with hash -626263574, now seen corresponding path program 9 times [2020-08-18 22:50:11,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:11,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064221943] [2020-08-18 22:50:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:11,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:11,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:12,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064221943] [2020-08-18 22:50:12,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:12,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 22:50:12,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231977619] [2020-08-18 22:50:12,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 22:50:12,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:12,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 22:50:12,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-08-18 22:50:12,468 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 23 states. [2020-08-18 22:50:12,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:12,812 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-08-18 22:50:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 22:50:12,815 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2020-08-18 22:50:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:12,816 INFO L225 Difference]: With dead ends: 90 [2020-08-18 22:50:12,816 INFO L226 Difference]: Without dead ends: 68 [2020-08-18 22:50:12,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2020-08-18 22:50:12,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-18 22:50:12,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-08-18 22:50:12,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-18 22:50:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-08-18 22:50:12,821 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-08-18 22:50:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:12,821 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-08-18 22:50:12,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 22:50:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-08-18 22:50:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 22:50:12,822 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:12,822 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:12,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 22:50:12,822 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:12,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1912880044, now seen corresponding path program 10 times [2020-08-18 22:50:12,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:12,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045351450] [2020-08-18 22:50:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:12,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:12,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:13,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045351450] [2020-08-18 22:50:13,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:13,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 22:50:13,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567476832] [2020-08-18 22:50:13,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 22:50:13,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:13,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 22:50:13,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-08-18 22:50:13,819 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 24 states. [2020-08-18 22:50:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:14,094 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-08-18 22:50:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 22:50:14,094 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-08-18 22:50:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:14,095 INFO L225 Difference]: With dead ends: 92 [2020-08-18 22:50:14,095 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 22:50:14,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=266, Invalid=436, Unknown=0, NotChecked=0, Total=702 [2020-08-18 22:50:14,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 22:50:14,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-18 22:50:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 22:50:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-08-18 22:50:14,100 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2020-08-18 22:50:14,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:14,101 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-08-18 22:50:14,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 22:50:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-08-18 22:50:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-18 22:50:14,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:14,102 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:14,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 22:50:14,102 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:14,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:14,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1806494482, now seen corresponding path program 11 times [2020-08-18 22:50:14,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:14,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608540698] [2020-08-18 22:50:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:14,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:14,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:15,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608540698] [2020-08-18 22:50:15,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:15,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 22:50:15,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761811958] [2020-08-18 22:50:15,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 22:50:15,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:15,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 22:50:15,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-08-18 22:50:15,062 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 25 states. [2020-08-18 22:50:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:15,403 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-08-18 22:50:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 22:50:15,404 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-08-18 22:50:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:15,405 INFO L225 Difference]: With dead ends: 94 [2020-08-18 22:50:15,405 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 22:50:15,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2020-08-18 22:50:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 22:50:15,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-18 22:50:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-18 22:50:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-08-18 22:50:15,410 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-08-18 22:50:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:15,411 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-08-18 22:50:15,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 22:50:15,411 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-08-18 22:50:15,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 22:50:15,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:15,412 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:15,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 22:50:15,412 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:15,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:15,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1582343600, now seen corresponding path program 12 times [2020-08-18 22:50:15,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:15,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447594032] [2020-08-18 22:50:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:15,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:15,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:16,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447594032] [2020-08-18 22:50:16,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:16,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 22:50:16,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060407251] [2020-08-18 22:50:16,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 22:50:16,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:16,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 22:50:16,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-08-18 22:50:16,492 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 26 states. [2020-08-18 22:50:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:16,866 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-08-18 22:50:16,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 22:50:16,867 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2020-08-18 22:50:16,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:16,867 INFO L225 Difference]: With dead ends: 96 [2020-08-18 22:50:16,868 INFO L226 Difference]: Without dead ends: 74 [2020-08-18 22:50:16,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2020-08-18 22:50:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-18 22:50:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-08-18 22:50:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-18 22:50:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-08-18 22:50:16,875 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-08-18 22:50:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:16,875 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-08-18 22:50:16,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 22:50:16,876 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-08-18 22:50:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-18 22:50:16,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:16,877 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:16,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 22:50:16,877 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:16,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1624437262, now seen corresponding path program 13 times [2020-08-18 22:50:16,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:16,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560926653] [2020-08-18 22:50:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:16,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:16,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:18,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560926653] [2020-08-18 22:50:18,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:18,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 22:50:18,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618646006] [2020-08-18 22:50:18,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 22:50:18,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:18,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 22:50:18,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-08-18 22:50:18,402 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 27 states. [2020-08-18 22:50:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:18,681 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-08-18 22:50:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 22:50:18,681 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-08-18 22:50:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:18,682 INFO L225 Difference]: With dead ends: 98 [2020-08-18 22:50:18,683 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 22:50:18,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2020-08-18 22:50:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 22:50:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-18 22:50:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 22:50:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-08-18 22:50:18,688 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-08-18 22:50:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:18,688 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-08-18 22:50:18,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 22:50:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-08-18 22:50:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-18 22:50:18,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:18,689 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:18,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 22:50:18,690 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:18,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:18,690 INFO L82 PathProgramCache]: Analyzing trace with hash 445672884, now seen corresponding path program 14 times [2020-08-18 22:50:18,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:18,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103019985] [2020-08-18 22:50:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:18,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:18,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:19,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103019985] [2020-08-18 22:50:19,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:19,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 22:50:19,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489055357] [2020-08-18 22:50:19,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 22:50:19,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:19,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 22:50:19,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-08-18 22:50:19,845 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 28 states. [2020-08-18 22:50:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:20,182 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-08-18 22:50:20,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 22:50:20,182 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-08-18 22:50:20,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:20,183 INFO L225 Difference]: With dead ends: 100 [2020-08-18 22:50:20,184 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 22:50:20,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=364, Invalid=566, Unknown=0, NotChecked=0, Total=930 [2020-08-18 22:50:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 22:50:20,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-08-18 22:50:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 22:50:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-08-18 22:50:20,189 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-08-18 22:50:20,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:20,190 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-08-18 22:50:20,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 22:50:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-08-18 22:50:20,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 22:50:20,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:20,191 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:20,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 22:50:20,191 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:20,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:20,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1251665142, now seen corresponding path program 15 times [2020-08-18 22:50:20,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:20,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275544845] [2020-08-18 22:50:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:20,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:20,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:21,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275544845] [2020-08-18 22:50:21,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:21,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 22:50:21,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242922637] [2020-08-18 22:50:21,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 22:50:21,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:21,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 22:50:21,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-08-18 22:50:21,765 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 29 states. [2020-08-18 22:50:22,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:22,157 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-08-18 22:50:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 22:50:22,157 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-08-18 22:50:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:22,158 INFO L225 Difference]: With dead ends: 102 [2020-08-18 22:50:22,158 INFO L226 Difference]: Without dead ends: 80 [2020-08-18 22:50:22,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-08-18 22:50:22,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-18 22:50:22,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-08-18 22:50:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 22:50:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-08-18 22:50:22,165 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-08-18 22:50:22,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:22,165 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-08-18 22:50:22,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 22:50:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-08-18 22:50:22,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-18 22:50:22,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:22,166 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:22,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 22:50:22,167 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:22,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:22,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1578855496, now seen corresponding path program 16 times [2020-08-18 22:50:22,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:22,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917412029] [2020-08-18 22:50:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:22,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:22,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:23,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917412029] [2020-08-18 22:50:23,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:23,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 22:50:23,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037918411] [2020-08-18 22:50:23,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 22:50:23,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:23,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 22:50:23,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-08-18 22:50:23,524 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 30 states. [2020-08-18 22:50:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:23,812 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-08-18 22:50:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 22:50:23,813 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-08-18 22:50:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:23,814 INFO L225 Difference]: With dead ends: 104 [2020-08-18 22:50:23,814 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 22:50:23,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 22:50:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 22:50:23,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-08-18 22:50:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 22:50:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-08-18 22:50:23,820 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2020-08-18 22:50:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:23,820 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-08-18 22:50:23,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 22:50:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-08-18 22:50:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-18 22:50:23,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:23,821 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:23,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 22:50:23,822 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:23,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1300077050, now seen corresponding path program 17 times [2020-08-18 22:50:23,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:23,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544230797] [2020-08-18 22:50:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:23,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:23,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:25,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544230797] [2020-08-18 22:50:25,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:25,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-18 22:50:25,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077270195] [2020-08-18 22:50:25,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-18 22:50:25,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:25,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-18 22:50:25,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-08-18 22:50:25,217 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 31 states. [2020-08-18 22:50:25,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:25,634 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-08-18 22:50:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-18 22:50:25,634 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-08-18 22:50:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:25,635 INFO L225 Difference]: With dead ends: 106 [2020-08-18 22:50:25,635 INFO L226 Difference]: Without dead ends: 84 [2020-08-18 22:50:25,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=448, Invalid=674, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 22:50:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-18 22:50:25,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-08-18 22:50:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 22:50:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-08-18 22:50:25,641 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-08-18 22:50:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:25,642 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-08-18 22:50:25,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-18 22:50:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-08-18 22:50:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 22:50:25,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:25,643 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:25,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 22:50:25,643 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:25,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1995315132, now seen corresponding path program 18 times [2020-08-18 22:50:25,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:25,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90628893] [2020-08-18 22:50:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:25,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:25,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:27,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90628893] [2020-08-18 22:50:27,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:27,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-18 22:50:27,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663446974] [2020-08-18 22:50:27,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-18 22:50:27,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:27,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-18 22:50:27,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-08-18 22:50:27,198 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 32 states. [2020-08-18 22:50:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:27,683 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-08-18 22:50:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 22:50:27,684 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2020-08-18 22:50:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:27,685 INFO L225 Difference]: With dead ends: 108 [2020-08-18 22:50:27,685 INFO L226 Difference]: Without dead ends: 86 [2020-08-18 22:50:27,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=478, Invalid=712, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 22:50:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-18 22:50:27,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-08-18 22:50:27,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 22:50:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-08-18 22:50:27,691 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-08-18 22:50:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:27,691 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-08-18 22:50:27,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-18 22:50:27,691 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-08-18 22:50:27,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-18 22:50:27,692 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:27,692 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:27,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 22:50:27,693 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:27,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:27,693 INFO L82 PathProgramCache]: Analyzing trace with hash 104213758, now seen corresponding path program 19 times [2020-08-18 22:50:27,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:27,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117337974] [2020-08-18 22:50:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:27,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:27,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:29,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117337974] [2020-08-18 22:50:29,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:29,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-18 22:50:29,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036117610] [2020-08-18 22:50:29,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-18 22:50:29,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:29,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-18 22:50:29,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 22:50:29,316 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 33 states. [2020-08-18 22:50:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:29,784 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-08-18 22:50:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 22:50:29,784 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2020-08-18 22:50:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:29,785 INFO L225 Difference]: With dead ends: 110 [2020-08-18 22:50:29,785 INFO L226 Difference]: Without dead ends: 88 [2020-08-18 22:50:29,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=509, Invalid=751, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 22:50:29,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-18 22:50:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-08-18 22:50:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-18 22:50:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-08-18 22:50:29,794 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-08-18 22:50:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:29,794 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-08-18 22:50:29,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-18 22:50:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-08-18 22:50:29,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-18 22:50:29,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:29,797 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:29,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 22:50:29,797 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:29,798 INFO L82 PathProgramCache]: Analyzing trace with hash -473040448, now seen corresponding path program 20 times [2020-08-18 22:50:29,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:29,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728522708] [2020-08-18 22:50:29,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:29,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:29,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:31,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728522708] [2020-08-18 22:50:31,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:31,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-18 22:50:31,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215679972] [2020-08-18 22:50:31,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-18 22:50:31,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:31,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-18 22:50:31,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 22:50:31,435 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 34 states. [2020-08-18 22:50:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:31,925 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-08-18 22:50:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-18 22:50:31,925 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2020-08-18 22:50:31,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:31,926 INFO L225 Difference]: With dead ends: 112 [2020-08-18 22:50:31,926 INFO L226 Difference]: Without dead ends: 90 [2020-08-18 22:50:31,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=541, Invalid=791, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 22:50:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-18 22:50:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-08-18 22:50:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-18 22:50:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-08-18 22:50:31,933 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2020-08-18 22:50:31,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:31,934 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-08-18 22:50:31,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-18 22:50:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-08-18 22:50:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 22:50:31,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:31,935 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:31,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 22:50:31,936 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:31,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1163551230, now seen corresponding path program 21 times [2020-08-18 22:50:31,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:31,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813745146] [2020-08-18 22:50:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:31,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:32,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:33,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813745146] [2020-08-18 22:50:33,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:33,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-18 22:50:33,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819681204] [2020-08-18 22:50:33,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-18 22:50:33,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:33,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-18 22:50:33,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 22:50:33,748 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 35 states. [2020-08-18 22:50:34,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:34,228 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-08-18 22:50:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-18 22:50:34,229 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-08-18 22:50:34,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:34,230 INFO L225 Difference]: With dead ends: 114 [2020-08-18 22:50:34,230 INFO L226 Difference]: Without dead ends: 92 [2020-08-18 22:50:34,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=574, Invalid=832, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 22:50:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-18 22:50:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-08-18 22:50:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-18 22:50:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-08-18 22:50:34,237 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2020-08-18 22:50:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:34,237 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-08-18 22:50:34,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-18 22:50:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-08-18 22:50:34,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 22:50:34,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:34,238 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:34,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-18 22:50:34,239 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:34,239 INFO L82 PathProgramCache]: Analyzing trace with hash 975518148, now seen corresponding path program 22 times [2020-08-18 22:50:34,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:34,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240194763] [2020-08-18 22:50:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:34,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:34,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:36,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240194763] [2020-08-18 22:50:36,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:36,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-18 22:50:36,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175161433] [2020-08-18 22:50:36,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-18 22:50:36,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:36,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-18 22:50:36,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 22:50:36,031 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 36 states. [2020-08-18 22:50:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:36,464 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-08-18 22:50:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-18 22:50:36,465 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 86 [2020-08-18 22:50:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:36,466 INFO L225 Difference]: With dead ends: 116 [2020-08-18 22:50:36,466 INFO L226 Difference]: Without dead ends: 94 [2020-08-18 22:50:36,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=608, Invalid=874, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 22:50:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-18 22:50:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-08-18 22:50:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-18 22:50:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-08-18 22:50:36,473 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2020-08-18 22:50:36,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:36,473 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-08-18 22:50:36,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-18 22:50:36,474 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-08-18 22:50:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-18 22:50:36,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:36,475 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:36,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-18 22:50:36,475 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:36,475 INFO L82 PathProgramCache]: Analyzing trace with hash -668144378, now seen corresponding path program 23 times [2020-08-18 22:50:36,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:36,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757370886] [2020-08-18 22:50:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:36,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:36,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:38,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757370886] [2020-08-18 22:50:38,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:38,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-18 22:50:38,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521495600] [2020-08-18 22:50:38,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-18 22:50:38,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:38,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-18 22:50:38,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 22:50:38,376 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 37 states. [2020-08-18 22:50:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:38,895 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-08-18 22:50:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-18 22:50:38,896 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2020-08-18 22:50:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:38,897 INFO L225 Difference]: With dead ends: 118 [2020-08-18 22:50:38,897 INFO L226 Difference]: Without dead ends: 96 [2020-08-18 22:50:38,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=643, Invalid=917, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 22:50:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-18 22:50:38,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-08-18 22:50:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-18 22:50:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-08-18 22:50:38,903 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2020-08-18 22:50:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:38,903 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-08-18 22:50:38,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-18 22:50:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-08-18 22:50:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-18 22:50:38,904 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:38,904 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:38,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-18 22:50:38,904 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:38,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:38,904 INFO L82 PathProgramCache]: Analyzing trace with hash 320133064, now seen corresponding path program 24 times [2020-08-18 22:50:38,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:38,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765010563] [2020-08-18 22:50:38,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:38,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:38,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:40,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765010563] [2020-08-18 22:50:40,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:40,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-18 22:50:40,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538912591] [2020-08-18 22:50:40,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-18 22:50:40,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:40,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-18 22:50:40,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 22:50:40,952 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 38 states. [2020-08-18 22:50:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:41,402 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-08-18 22:50:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-18 22:50:41,403 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-08-18 22:50:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:41,404 INFO L225 Difference]: With dead ends: 120 [2020-08-18 22:50:41,404 INFO L226 Difference]: Without dead ends: 98 [2020-08-18 22:50:41,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=679, Invalid=961, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 22:50:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-18 22:50:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-08-18 22:50:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-18 22:50:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-08-18 22:50:41,411 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2020-08-18 22:50:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:41,411 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-08-18 22:50:41,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-18 22:50:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-08-18 22:50:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 22:50:41,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:41,412 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:41,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-18 22:50:41,412 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:41,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:41,413 INFO L82 PathProgramCache]: Analyzing trace with hash 866982410, now seen corresponding path program 25 times [2020-08-18 22:50:41,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:41,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434679621] [2020-08-18 22:50:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:41,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:41,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:43,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434679621] [2020-08-18 22:50:43,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:43,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-18 22:50:43,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942918129] [2020-08-18 22:50:43,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-18 22:50:43,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:43,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-18 22:50:43,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-08-18 22:50:43,517 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 39 states. [2020-08-18 22:50:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:43,855 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-08-18 22:50:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-18 22:50:43,856 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-08-18 22:50:43,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:43,857 INFO L225 Difference]: With dead ends: 122 [2020-08-18 22:50:43,857 INFO L226 Difference]: Without dead ends: 100 [2020-08-18 22:50:43,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=716, Invalid=1006, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 22:50:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-18 22:50:43,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-08-18 22:50:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-18 22:50:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-08-18 22:50:43,863 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2020-08-18 22:50:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:43,863 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-08-18 22:50:43,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-18 22:50:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-08-18 22:50:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-18 22:50:43,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:43,864 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:43,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-18 22:50:43,865 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:43,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1891773492, now seen corresponding path program 26 times [2020-08-18 22:50:43,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:43,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671531167] [2020-08-18 22:50:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:43,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:43,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:46,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671531167] [2020-08-18 22:50:46,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:46,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-18 22:50:46,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81660661] [2020-08-18 22:50:46,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-18 22:50:46,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:46,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-18 22:50:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-08-18 22:50:46,201 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 40 states. [2020-08-18 22:50:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:46,533 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-08-18 22:50:46,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-18 22:50:46,533 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 94 [2020-08-18 22:50:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:46,534 INFO L225 Difference]: With dead ends: 124 [2020-08-18 22:50:46,534 INFO L226 Difference]: Without dead ends: 102 [2020-08-18 22:50:46,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=754, Invalid=1052, Unknown=0, NotChecked=0, Total=1806 [2020-08-18 22:50:46,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-18 22:50:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-08-18 22:50:46,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 22:50:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-08-18 22:50:46,543 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2020-08-18 22:50:46,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:46,544 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-08-18 22:50:46,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-18 22:50:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-08-18 22:50:46,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-18 22:50:46,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:46,545 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:46,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-18 22:50:46,545 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:46,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:46,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1233593614, now seen corresponding path program 27 times [2020-08-18 22:50:46,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:46,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315859375] [2020-08-18 22:50:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:46,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:46,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:48,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315859375] [2020-08-18 22:50:48,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:48,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-18 22:50:48,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779119944] [2020-08-18 22:50:48,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-18 22:50:48,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:48,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-18 22:50:48,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 22:50:48,873 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 41 states. [2020-08-18 22:50:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:49,224 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-08-18 22:50:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-18 22:50:49,225 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 96 [2020-08-18 22:50:49,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:49,226 INFO L225 Difference]: With dead ends: 126 [2020-08-18 22:50:49,227 INFO L226 Difference]: Without dead ends: 104 [2020-08-18 22:50:49,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=793, Invalid=1099, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 22:50:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-18 22:50:49,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-08-18 22:50:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-18 22:50:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-08-18 22:50:49,233 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2020-08-18 22:50:49,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:49,233 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-08-18 22:50:49,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-18 22:50:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-08-18 22:50:49,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 22:50:49,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:49,235 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:49,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-18 22:50:49,235 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:49,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1765724720, now seen corresponding path program 28 times [2020-08-18 22:50:49,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:49,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31344551] [2020-08-18 22:50:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:49,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:49,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:51,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31344551] [2020-08-18 22:50:51,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:51,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-18 22:50:51,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190160321] [2020-08-18 22:50:51,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-18 22:50:51,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:51,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-18 22:50:51,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 22:50:51,698 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 42 states. [2020-08-18 22:50:52,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:52,113 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-08-18 22:50:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-18 22:50:52,114 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2020-08-18 22:50:52,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:52,115 INFO L225 Difference]: With dead ends: 128 [2020-08-18 22:50:52,115 INFO L226 Difference]: Without dead ends: 106 [2020-08-18 22:50:52,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=833, Invalid=1147, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 22:50:52,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-18 22:50:52,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-08-18 22:50:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-18 22:50:52,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-08-18 22:50:52,121 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2020-08-18 22:50:52,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:52,121 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-08-18 22:50:52,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-18 22:50:52,121 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-08-18 22:50:52,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-18 22:50:52,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:52,122 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:52,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-18 22:50:52,122 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:52,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:52,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2107379218, now seen corresponding path program 29 times [2020-08-18 22:50:52,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:52,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476567033] [2020-08-18 22:50:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:52,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:52,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:50:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat