/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:26:01,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:26:01,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:26:01,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:26:01,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:26:01,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:26:01,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:26:01,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:26:01,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:26:01,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:26:01,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:26:01,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:26:01,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:26:01,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:26:01,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:26:01,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:26:01,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:26:01,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:26:01,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:26:01,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:26:01,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:26:01,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:26:01,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:26:01,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:26:01,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:26:01,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:26:01,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:26:01,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:26:01,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:26:01,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:26:01,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:26:01,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:26:01,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:26:01,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:26:01,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:26:01,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:26:01,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:26:01,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:26:01,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:26:01,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:26:01,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:26:01,908 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 [2020-09-24 19:26:01,934 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:26:01,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:26:01,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:26:01,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:26:01,936 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:26:01,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:26:01,937 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:26:01,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:26:01,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:26:01,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:26:01,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:26:01,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:26:01,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:26:01,938 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:26:01,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:26:01,938 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:26:01,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:26:01,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:26:01,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:26:01,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:26:01,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:26:01,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:26:01,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:26:01,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:26:01,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:26:01,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:26:01,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:26:01,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:26:01,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:26:01,941 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:26:02,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:26:02,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:26:02,467 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:26:02,470 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:26:02,471 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:26:02,472 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2020-09-24 19:26:02,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a12adcdbc/ec686233b131492393c1e65fd9088af7/FLAG8db6c5e23 [2020-09-24 19:26:03,195 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:26:03,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2020-09-24 19:26:03,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a12adcdbc/ec686233b131492393c1e65fd9088af7/FLAG8db6c5e23 [2020-09-24 19:26:03,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a12adcdbc/ec686233b131492393c1e65fd9088af7 [2020-09-24 19:26:03,462 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:26:03,472 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:26:03,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:26:03,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:26:03,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:26:03,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:26:03" (1/1) ... [2020-09-24 19:26:03,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:26:03, skipping insertion in model container [2020-09-24 19:26:03,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:26:03" (1/1) ... [2020-09-24 19:26:03,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:26:03,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:26:04,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:26:04,046 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:26:04,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:26:04,311 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:26:04,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:26:04 WrapperNode [2020-09-24 19:26:04,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:26:04,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:26:04,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:26:04,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:26:04,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:26:04" (1/1) ... [2020-09-24 19:26:04,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:26:04" (1/1) ... [2020-09-24 19:26:04,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:26:04" (1/1) ... [2020-09-24 19:26:04,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:26:04" (1/1) ... [2020-09-24 19:26:04,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:26:04" (1/1) ... [2020-09-24 19:26:04,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:26:04" (1/1) ... [2020-09-24 19:26:04,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:26:04" (1/1) ... [2020-09-24 19:26:04,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:26:04,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:26:04,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:26:04,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:26:04,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:26:04" (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 [2020-09-24 19:26:04,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:26:04,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:26:04,544 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 19:26:04,544 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:26:04,545 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 19:26:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:26:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 19:26:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 19:26:04,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:26:04,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:26:04,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:26:05,966 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:26:05,966 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 19:26:05,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:26:05 BoogieIcfgContainer [2020-09-24 19:26:05,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:26:05,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:26:05,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:26:05,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:26:05,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:26:03" (1/3) ... [2020-09-24 19:26:05,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:26:05, skipping insertion in model container [2020-09-24 19:26:05,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:26:04" (2/3) ... [2020-09-24 19:26:05,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:26:05, skipping insertion in model container [2020-09-24 19:26:05,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:26:05" (3/3) ... [2020-09-24 19:26:05,998 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label50.c [2020-09-24 19:26:06,013 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:26:06,030 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:26:06,057 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:26:06,107 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:26:06,109 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:26:06,109 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:26:06,109 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:26:06,109 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:26:06,110 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:26:06,110 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:26:06,110 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:26:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 19:26:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-24 19:26:06,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:06,194 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:06,195 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:06,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:06,203 INFO L82 PathProgramCache]: Analyzing trace with hash 249673445, now seen corresponding path program 1 times [2020-09-24 19:26:06,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:06,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036488076] [2020-09-24 19:26:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:06,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:07,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:07,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:07,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-09-24 19:26:07,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:26:07,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1024 [2020-09-24 19:26:07,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:07,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:26:07,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 19:26:07,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 19:26:07,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:26:07,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:07,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:07,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:07,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:07,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:07,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 19:26:07,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:07,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:26:07,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:07,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 19:26:07,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:26:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:26:08,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036488076] [2020-09-24 19:26:08,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:26:08,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:26:08,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239057285] [2020-09-24 19:26:08,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:26:08,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:08,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:26:08,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:26:08,073 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 5 states. [2020-09-24 19:26:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:10,308 INFO L93 Difference]: Finished difference Result 1259 states and 1658 transitions. [2020-09-24 19:26:10,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:26:10,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2020-09-24 19:26:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:10,346 INFO L225 Difference]: With dead ends: 1259 [2020-09-24 19:26:10,346 INFO L226 Difference]: Without dead ends: 685 [2020-09-24 19:26:10,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:26:10,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-09-24 19:26:10,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 603. [2020-09-24 19:26:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-24 19:26:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 725 transitions. [2020-09-24 19:26:10,462 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 725 transitions. Word has length 107 [2020-09-24 19:26:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:10,463 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 725 transitions. [2020-09-24 19:26:10,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:26:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 725 transitions. [2020-09-24 19:26:10,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-24 19:26:10,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:10,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:10,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:26:10,470 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:10,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:10,471 INFO L82 PathProgramCache]: Analyzing trace with hash -191439372, now seen corresponding path program 1 times [2020-09-24 19:26:10,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:10,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830157969] [2020-09-24 19:26:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:10,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:10,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:11,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:11,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-09-24 19:26:11,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:26:11,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-24 19:26:11,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:11,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:26:11,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 19:26:11,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 19:26:11,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:11,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:11,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:11,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:11,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:11,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:11,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 19:26:11,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:11,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:26:11,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:11,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 19:26:11,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:26:11,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:11,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:11,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:11,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 19:26:11,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:11,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-24 19:26:11,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:11,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:11,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:11,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 19:26:11,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:26:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:26:11,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830157969] [2020-09-24 19:26:11,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:26:11,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 19:26:11,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951746408] [2020-09-24 19:26:11,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:26:11,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:11,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:26:11,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:26:11,891 INFO L87 Difference]: Start difference. First operand 603 states and 725 transitions. Second operand 8 states. [2020-09-24 19:26:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:13,976 INFO L93 Difference]: Finished difference Result 1436 states and 1760 transitions. [2020-09-24 19:26:13,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 19:26:13,979 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 128 [2020-09-24 19:26:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:13,984 INFO L225 Difference]: With dead ends: 1436 [2020-09-24 19:26:13,985 INFO L226 Difference]: Without dead ends: 857 [2020-09-24 19:26:13,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:26:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2020-09-24 19:26:14,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 748. [2020-09-24 19:26:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2020-09-24 19:26:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 916 transitions. [2020-09-24 19:26:14,036 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 916 transitions. Word has length 128 [2020-09-24 19:26:14,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:14,037 INFO L479 AbstractCegarLoop]: Abstraction has 748 states and 916 transitions. [2020-09-24 19:26:14,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:26:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 916 transitions. [2020-09-24 19:26:14,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-24 19:26:14,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:14,042 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:14,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:26:14,043 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:14,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:14,043 INFO L82 PathProgramCache]: Analyzing trace with hash 851491254, now seen corresponding path program 1 times [2020-09-24 19:26:14,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:14,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087498830] [2020-09-24 19:26:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:14,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:14,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:14,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:14,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:15,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:15,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-09-24 19:26:15,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:26:15,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-24 19:26:15,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:15,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 19:26:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-24 19:26:15,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:15,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:15,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:15,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:15,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:15,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:15,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 19:26:15,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:15,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:15,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:15,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:15,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:15,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:15,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:15,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:15,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 19:26:15,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:15,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 19:26:15,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:15,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:26:15,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:15,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:26:15,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:26:15,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087498830] [2020-09-24 19:26:15,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:15,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 19:26:15,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498343004] [2020-09-24 19:26:15,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:26:15,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:15,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:26:15,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:26:15,396 INFO L87 Difference]: Start difference. First operand 748 states and 916 transitions. Second operand 5 states. [2020-09-24 19:26:17,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:17,387 INFO L93 Difference]: Finished difference Result 1996 states and 2545 transitions. [2020-09-24 19:26:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:26:17,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-09-24 19:26:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:17,408 INFO L225 Difference]: With dead ends: 1996 [2020-09-24 19:26:17,409 INFO L226 Difference]: Without dead ends: 1272 [2020-09-24 19:26:17,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:26:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2020-09-24 19:26:17,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1181. [2020-09-24 19:26:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1181 states. [2020-09-24 19:26:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1509 transitions. [2020-09-24 19:26:17,492 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1509 transitions. Word has length 128 [2020-09-24 19:26:17,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:17,493 INFO L479 AbstractCegarLoop]: Abstraction has 1181 states and 1509 transitions. [2020-09-24 19:26:17,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:26:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1509 transitions. [2020-09-24 19:26:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-09-24 19:26:17,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:17,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:17,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:26:17,501 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:17,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:17,502 INFO L82 PathProgramCache]: Analyzing trace with hash -645015236, now seen corresponding path program 1 times [2020-09-24 19:26:17,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:17,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981099039] [2020-09-24 19:26:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:17,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:17,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:17,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:17,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:18,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:18,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:18,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:18,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:18,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 19:26:18,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 19:26:18,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1024 [2020-09-24 19:26:18,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:18,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:26:18,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 19:26:18,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 19:26:18,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:18,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:18,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:18,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:18,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:18,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:18,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 19:26:18,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:18,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:26:18,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:18,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 19:26:18,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:18,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:18,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:18,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:18,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 19:26:18,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:18,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-24 19:26:18,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 19:26:18,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:26:18,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981099039] [2020-09-24 19:26:18,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:26:18,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 19:26:18,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304962790] [2020-09-24 19:26:18,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:26:18,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:18,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:26:18,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:26:18,865 INFO L87 Difference]: Start difference. First operand 1181 states and 1509 transitions. Second operand 7 states. [2020-09-24 19:26:21,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:21,097 INFO L93 Difference]: Finished difference Result 2431 states and 3158 transitions. [2020-09-24 19:26:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:26:21,097 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 137 [2020-09-24 19:26:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:21,107 INFO L225 Difference]: With dead ends: 2431 [2020-09-24 19:26:21,107 INFO L226 Difference]: Without dead ends: 1274 [2020-09-24 19:26:21,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 19:26:21,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2020-09-24 19:26:21,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1202. [2020-09-24 19:26:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1202 states. [2020-09-24 19:26:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1524 transitions. [2020-09-24 19:26:21,170 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1524 transitions. Word has length 137 [2020-09-24 19:26:21,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:21,171 INFO L479 AbstractCegarLoop]: Abstraction has 1202 states and 1524 transitions. [2020-09-24 19:26:21,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:26:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1524 transitions. [2020-09-24 19:26:21,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-09-24 19:26:21,206 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:21,206 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:21,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:26:21,207 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:21,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2034223220, now seen corresponding path program 1 times [2020-09-24 19:26:21,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:21,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230257269] [2020-09-24 19:26:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:21,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:21,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:22,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:22,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-09-24 19:26:22,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:26:22,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-09-24 19:26:22,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:26:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 19:26:22,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 19:26:22,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:22,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:22,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:22,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:22,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:22,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:22,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 19:26:22,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:22,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:26:22,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:22,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 19:26:22,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:22,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:22,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:22,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:22,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:26:22,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:22,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-24 19:26:22,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:22,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:22,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:22,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 19:26:22,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:26:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:26:22,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230257269] [2020-09-24 19:26:22,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:26:22,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 19:26:22,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062546178] [2020-09-24 19:26:22,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:26:22,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:22,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:26:22,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:26:22,587 INFO L87 Difference]: Start difference. First operand 1202 states and 1524 transitions. Second operand 8 states. [2020-09-24 19:26:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:25,722 INFO L93 Difference]: Finished difference Result 3637 states and 5030 transitions. [2020-09-24 19:26:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 19:26:25,722 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 144 [2020-09-24 19:26:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:25,742 INFO L225 Difference]: With dead ends: 3637 [2020-09-24 19:26:25,742 INFO L226 Difference]: Without dead ends: 2459 [2020-09-24 19:26:25,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:26:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2020-09-24 19:26:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2225. [2020-09-24 19:26:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2225 states. [2020-09-24 19:26:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2912 transitions. [2020-09-24 19:26:25,890 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2912 transitions. Word has length 144 [2020-09-24 19:26:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:25,891 INFO L479 AbstractCegarLoop]: Abstraction has 2225 states and 2912 transitions. [2020-09-24 19:26:25,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:26:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2912 transitions. [2020-09-24 19:26:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-24 19:26:25,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:25,902 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:25,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:26:25,903 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:25,904 INFO L82 PathProgramCache]: Analyzing trace with hash 281598029, now seen corresponding path program 1 times [2020-09-24 19:26:25,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:25,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990416409] [2020-09-24 19:26:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:25,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:26,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:26,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:26,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:26,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:26,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:26,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:26,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-09-24 19:26:26,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:26:26,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-24 19:26:26,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:26,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:26,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 19:26:26,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 19:26:26,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:27,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:27,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:27,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:27,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:27,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:27,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:26:27,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:27,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:27,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:27,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:27,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:26:27,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:27,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:27,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:27,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 19:26:27,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:27,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 19:26:27,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:26:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:26:27,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:26:27,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 19:26:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:27,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:27,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:27,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 19:26:27,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:27,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-24 19:26:27,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:27,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:27,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:27,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 19:26:27,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:26:27,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990416409] [2020-09-24 19:26:27,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:27,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:26:27,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838726574] [2020-09-24 19:26:27,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:26:27,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:27,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:26:27,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:26:27,354 INFO L87 Difference]: Start difference. First operand 2225 states and 2912 transitions. Second operand 7 states. [2020-09-24 19:26:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:30,283 INFO L93 Difference]: Finished difference Result 5127 states and 7151 transitions. [2020-09-24 19:26:30,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 19:26:30,286 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 158 [2020-09-24 19:26:30,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:30,310 INFO L225 Difference]: With dead ends: 5127 [2020-09-24 19:26:30,310 INFO L226 Difference]: Without dead ends: 2926 [2020-09-24 19:26:30,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:26:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2020-09-24 19:26:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2394. [2020-09-24 19:26:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2394 states. [2020-09-24 19:26:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 3117 transitions. [2020-09-24 19:26:30,426 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 3117 transitions. Word has length 158 [2020-09-24 19:26:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:30,426 INFO L479 AbstractCegarLoop]: Abstraction has 2394 states and 3117 transitions. [2020-09-24 19:26:30,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:26:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 3117 transitions. [2020-09-24 19:26:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-24 19:26:30,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:30,438 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:30,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:26:30,439 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:30,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1490542447, now seen corresponding path program 1 times [2020-09-24 19:26:30,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:30,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50648861] [2020-09-24 19:26:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:30,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:30,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:30,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:31,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:31,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-09-24 19:26:31,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:26:31,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-09-24 19:26:31,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:26:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-24 19:26:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 19:26:31,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:31,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:31,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:31,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:31,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:31,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:31,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 19:26:31,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:31,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:31,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:31,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:31,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:31,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:31,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:31,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:31,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:26:31,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:31,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 19:26:31,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:26:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:31,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 19:26:31,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:31,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-24 19:26:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:31,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:31,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:31,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 19:26:31,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:31,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-24 19:26:31,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:31,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:31,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:31,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 19:26:31,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:26:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:26:31,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50648861] [2020-09-24 19:26:31,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:31,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:26:31,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279700798] [2020-09-24 19:26:31,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:26:31,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:31,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:26:31,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:26:31,837 INFO L87 Difference]: Start difference. First operand 2394 states and 3117 transitions. Second operand 8 states. [2020-09-24 19:26:32,461 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-09-24 19:26:35,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:35,132 INFO L93 Difference]: Finished difference Result 6550 states and 8854 transitions. [2020-09-24 19:26:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 19:26:35,133 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 166 [2020-09-24 19:26:35,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:35,156 INFO L225 Difference]: With dead ends: 6550 [2020-09-24 19:26:35,156 INFO L226 Difference]: Without dead ends: 4180 [2020-09-24 19:26:35,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-24 19:26:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2020-09-24 19:26:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 3132. [2020-09-24 19:26:35,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3132 states. [2020-09-24 19:26:35,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3132 states to 3132 states and 4049 transitions. [2020-09-24 19:26:35,279 INFO L78 Accepts]: Start accepts. Automaton has 3132 states and 4049 transitions. Word has length 166 [2020-09-24 19:26:35,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:35,279 INFO L479 AbstractCegarLoop]: Abstraction has 3132 states and 4049 transitions. [2020-09-24 19:26:35,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:26:35,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3132 states and 4049 transitions. [2020-09-24 19:26:35,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-24 19:26:35,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:35,291 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:35,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:26:35,292 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:35,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:35,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1736106666, now seen corresponding path program 1 times [2020-09-24 19:26:35,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:35,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696577278] [2020-09-24 19:26:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:35,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:35,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:35,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:36,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:36,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:36,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-09-24 19:26:36,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:26:36,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1056 [2020-09-24 19:26:36,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:36,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:26:36,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-09-24 19:26:36,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 19:26:36,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:36,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:36,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:36,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:36,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:36,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:36,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 19:26:36,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:36,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:36,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:36,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:36,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:36,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:36,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:36,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:36,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 19:26:36,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:36,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-24 19:26:36,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:36,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:26:36,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 19:26:36,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:26:36,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 19:26:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:36,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:36,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:36,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 19:26:36,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:36,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-24 19:26:36,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:36,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:36,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:36,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 19:26:36,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:26:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:26:36,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696577278] [2020-09-24 19:26:36,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:36,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:26:36,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067435782] [2020-09-24 19:26:36,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:26:36,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:36,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:26:36,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:26:36,911 INFO L87 Difference]: Start difference. First operand 3132 states and 4049 transitions. Second operand 8 states. [2020-09-24 19:26:40,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:40,594 INFO L93 Difference]: Finished difference Result 7712 states and 10592 transitions. [2020-09-24 19:26:40,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 19:26:40,595 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 180 [2020-09-24 19:26:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:40,627 INFO L225 Difference]: With dead ends: 7712 [2020-09-24 19:26:40,627 INFO L226 Difference]: Without dead ends: 4604 [2020-09-24 19:26:40,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-24 19:26:40,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2020-09-24 19:26:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 3593. [2020-09-24 19:26:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3593 states. [2020-09-24 19:26:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 4290 transitions. [2020-09-24 19:26:40,774 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 4290 transitions. Word has length 180 [2020-09-24 19:26:40,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:40,775 INFO L479 AbstractCegarLoop]: Abstraction has 3593 states and 4290 transitions. [2020-09-24 19:26:40,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:26:40,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 4290 transitions. [2020-09-24 19:26:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-24 19:26:40,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:40,786 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:40,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 19:26:40,787 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:40,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:40,787 INFO L82 PathProgramCache]: Analyzing trace with hash 59048286, now seen corresponding path program 1 times [2020-09-24 19:26:40,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:40,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505973907] [2020-09-24 19:26:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:40,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:40,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:41,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:41,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:41,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:41,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:41,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:41,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-09-24 19:26:41,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:26:41,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-24 19:26:41,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:41,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:26:41,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-09-24 19:26:41,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 19:26:41,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:41,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:41,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:41,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:41,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:41,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:41,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 19:26:41,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:41,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:41,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:41,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:41,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:42,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:42,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:42,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:42,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 19:26:42,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:42,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-24 19:26:42,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:42,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:26:42,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:42,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 19:26:42,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:42,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-24 19:26:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:42,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:42,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:42,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 19:26:42,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:42,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 19:26:42,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:42,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:42,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:42,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 19:26:42,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:26:42,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505973907] [2020-09-24 19:26:42,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:42,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:26:42,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007286441] [2020-09-24 19:26:42,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:26:42,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:42,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:26:42,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:26:42,354 INFO L87 Difference]: Start difference. First operand 3593 states and 4290 transitions. Second operand 9 states. [2020-09-24 19:26:43,557 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-09-24 19:26:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:46,314 INFO L93 Difference]: Finished difference Result 8236 states and 9870 transitions. [2020-09-24 19:26:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 19:26:46,315 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 186 [2020-09-24 19:26:46,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:46,334 INFO L225 Difference]: With dead ends: 8236 [2020-09-24 19:26:46,335 INFO L226 Difference]: Without dead ends: 4667 [2020-09-24 19:26:46,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-09-24 19:26:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2020-09-24 19:26:46,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 3744. [2020-09-24 19:26:46,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3744 states. [2020-09-24 19:26:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 4477 transitions. [2020-09-24 19:26:46,452 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 4477 transitions. Word has length 186 [2020-09-24 19:26:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:46,453 INFO L479 AbstractCegarLoop]: Abstraction has 3744 states and 4477 transitions. [2020-09-24 19:26:46,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:26:46,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 4477 transitions. [2020-09-24 19:26:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-09-24 19:26:46,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:46,466 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:46,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 19:26:46,467 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:46,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2063604262, now seen corresponding path program 1 times [2020-09-24 19:26:46,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:46,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386431374] [2020-09-24 19:26:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:46,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:46,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:46,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:47,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:47,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-09-24 19:26:47,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:26:47,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-09-24 19:26:47,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:47,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:26:47,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-09-24 19:26:47,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 19:26:47,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:47,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:47,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:47,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:47,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:47,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:47,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 19:26:47,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:47,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:47,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:47,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:47,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:47,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:47,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:47,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:47,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 19:26:47,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:47,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-09-24 19:26:47,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:47,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:26:47,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:47,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 19:26:47,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:47,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 19:26:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:47,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:47,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:47,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 19:26:47,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:47,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 19:26:47,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:47,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:47,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 19:26:47,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 19:26:47,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 19:26:48,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386431374] [2020-09-24 19:26:48,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:48,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:26:48,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688386134] [2020-09-24 19:26:48,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:26:48,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:48,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:26:48,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:26:48,008 INFO L87 Difference]: Start difference. First operand 3744 states and 4477 transitions. Second operand 8 states. [2020-09-24 19:26:48,975 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-09-24 19:26:51,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:26:51,527 INFO L93 Difference]: Finished difference Result 7849 states and 9434 transitions. [2020-09-24 19:26:51,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 19:26:51,528 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 204 [2020-09-24 19:26:51,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:26:51,565 INFO L225 Difference]: With dead ends: 7849 [2020-09-24 19:26:51,565 INFO L226 Difference]: Without dead ends: 4129 [2020-09-24 19:26:51,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-24 19:26:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2020-09-24 19:26:51,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 4054. [2020-09-24 19:26:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4054 states. [2020-09-24 19:26:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4054 states to 4054 states and 4834 transitions. [2020-09-24 19:26:51,743 INFO L78 Accepts]: Start accepts. Automaton has 4054 states and 4834 transitions. Word has length 204 [2020-09-24 19:26:51,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:26:51,743 INFO L479 AbstractCegarLoop]: Abstraction has 4054 states and 4834 transitions. [2020-09-24 19:26:51,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:26:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 4054 states and 4834 transitions. [2020-09-24 19:26:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-09-24 19:26:51,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:26:51,761 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:26:51,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 19:26:51,762 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:26:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:26:51,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1775821608, now seen corresponding path program 1 times [2020-09-24 19:26:51,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:26:51,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262420174] [2020-09-24 19:26:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:26:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:51,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:52,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:52,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:52,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:52,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:52,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:52,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-09-24 19:26:52,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:26:52,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1023 [2020-09-24 19:26:52,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:52,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:26:52,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-09-24 19:26:52,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-24 19:26:52,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:26:53,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:26:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:53,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:53,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:53,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:26:53,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:53,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 19:26:53,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:53,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:53,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:53,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:53,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:53,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 19:26:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:53,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:53,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:53,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 19:26:53,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:53,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 19:26:53,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:53,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:53,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:53,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:53,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:53,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 19:26:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:53,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:53,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:53,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 19:26:53,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:53,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-24 19:26:53,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:53,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:26:53,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:53,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:26:53,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:53,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-24 19:26:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:26:53,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:26:53,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:26:53,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 19:26:53,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:26:53,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-24 19:26:53,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:26:53,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:26:53,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:26:53,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-09-24 19:26:53,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:26:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 126 proven. 3 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-09-24 19:26:53,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262420174] [2020-09-24 19:26:53,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:26:53,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 19:26:53,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483382636] [2020-09-24 19:26:53,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:26:53,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:26:53,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:26:53,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:26:53,348 INFO L87 Difference]: Start difference. First operand 4054 states and 4834 transitions. Second operand 5 states.