/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:10:31,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:10:31,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:10:31,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:10:31,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:10:31,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:10:31,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:10:31,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:10:31,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:10:31,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:10:31,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:10:31,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:10:31,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:10:31,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:10:31,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:10:31,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:10:31,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:10:31,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:10:31,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:10:31,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:10:31,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:10:31,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:10:31,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:10:31,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:10:31,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:10:31,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:10:31,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:10:31,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:10:31,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:10:31,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:10:31,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:10:31,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:10:31,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:10:31,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:10:31,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:10:31,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:10:31,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:10:31,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:10:31,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:10:31,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:10:31,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:10:31,618 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 16:10:31,659 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:10:31,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:10:31,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:10:31,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:10:31,663 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:10:31,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:10:31,663 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:10:31,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:10:31,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:10:31,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:10:31,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:10:31,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:10:31,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:10:31,666 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:10:31,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:10:31,666 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:10:31,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:10:31,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:10:31,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:10:31,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:10:31,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:10:31,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:10:31,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:10:31,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:10:31,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:10:31,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:10:31,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:10:31,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:10:31,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:10:31,669 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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-24 16:10:32,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:10:32,189 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:10:32,193 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:10:32,195 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:10:32,196 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:10:32,198 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 16:10:32,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/091c35d75/2c12bd90fedd40d6955d2c8c45b9b655/FLAGae4c45ae9 [2020-09-24 16:10:32,853 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:10:32,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 16:10:32,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/091c35d75/2c12bd90fedd40d6955d2c8c45b9b655/FLAGae4c45ae9 [2020-09-24 16:10:33,148 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/091c35d75/2c12bd90fedd40d6955d2c8c45b9b655 [2020-09-24 16:10:33,161 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:10:33,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:10:33,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:33,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:10:33,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:10:33,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:33" (1/1) ... [2020-09-24 16:10:33,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd36ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:33, skipping insertion in model container [2020-09-24 16:10:33,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:33" (1/1) ... [2020-09-24 16:10:33,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:10:33,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:10:33,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:33,559 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:10:33,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:33,710 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:10:33,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:33 WrapperNode [2020-09-24 16:10:33,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:33,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:10:33,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:10:33,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:10:33,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:33" (1/1) ... [2020-09-24 16:10:33,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:33" (1/1) ... [2020-09-24 16:10:33,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:33" (1/1) ... [2020-09-24 16:10:33,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:33" (1/1) ... [2020-09-24 16:10:33,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:33" (1/1) ... [2020-09-24 16:10:33,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:33" (1/1) ... [2020-09-24 16:10:33,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:33" (1/1) ... [2020-09-24 16:10:33,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:10:33,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:10:33,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:10:33,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:10:33,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:33" (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 16:10:33,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:10:33,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:10:33,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:10:33,858 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-09-24 16:10:33,858 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-09-24 16:10:33,858 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:10:33,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:10:33,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:10:33,860 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-09-24 16:10:33,860 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-09-24 16:10:33,860 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-09-24 16:10:33,860 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-09-24 16:10:33,860 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-09-24 16:10:33,860 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-09-24 16:10:33,861 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-09-24 16:10:33,862 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-09-24 16:10:33,862 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-24 16:10:33,862 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-09-24 16:10:33,862 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-09-24 16:10:33,863 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-09-24 16:10:33,863 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-09-24 16:10:33,864 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-09-24 16:10:33,864 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-09-24 16:10:33,864 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-09-24 16:10:33,866 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-09-24 16:10:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-09-24 16:10:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-09-24 16:10:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-09-24 16:10:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-09-24 16:10:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-09-24 16:10:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-09-24 16:10:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-09-24 16:10:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-09-24 16:10:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-09-24 16:10:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 16:10:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 16:10:33,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 16:10:33,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 16:10:33,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:10:33,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:10:33,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:10:34,421 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:10:34,421 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 16:10:34,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:34 BoogieIcfgContainer [2020-09-24 16:10:34,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:10:34,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:10:34,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:10:34,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:10:34,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:10:33" (1/3) ... [2020-09-24 16:10:34,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bdddfb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:34, skipping insertion in model container [2020-09-24 16:10:34,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:33" (2/3) ... [2020-09-24 16:10:34,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bdddfb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:34, skipping insertion in model container [2020-09-24 16:10:34,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:34" (3/3) ... [2020-09-24 16:10:34,440 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 16:10:34,453 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:10:34,465 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:10:34,489 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:10:34,525 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:10:34,525 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:10:34,525 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:10:34,526 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:10:34,526 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:10:34,526 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:10:34,526 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:10:34,527 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:10:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-09-24 16:10:34,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 16:10:34,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:34,569 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] [2020-09-24 16:10:34,570 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:34,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:34,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2116113079, now seen corresponding path program 1 times [2020-09-24 16:10:34,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:34,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559997220] [2020-09-24 16:10:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:34,764 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:34,764 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:34,764 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:34,765 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:34,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 16:10:34,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:34,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 16:10:34,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:34,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:34,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 16:10:34,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:34,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:34,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:34,862 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:34,862 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:34,862 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:34,863 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:34,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:34,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:34,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:34,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:34,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:34,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:34,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:34,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:34,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 16:10:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:34,881 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:34,881 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:34,882 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:34,882 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:34,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:34,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:34,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:34,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:34,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:34,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:34,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:34,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:34,905 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 16:10:34,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559997220] [2020-09-24 16:10:34,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:34,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 16:10:34,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334067166] [2020-09-24 16:10:34,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 16:10:34,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:34,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 16:10:34,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:10:34,947 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 3 states. [2020-09-24 16:10:35,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:35,261 INFO L93 Difference]: Finished difference Result 227 states and 257 transitions. [2020-09-24 16:10:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 16:10:35,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-09-24 16:10:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:35,275 INFO L225 Difference]: With dead ends: 227 [2020-09-24 16:10:35,276 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 16:10:35,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:10:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 16:10:35,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-09-24 16:10:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-24 16:10:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-09-24 16:10:35,350 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 48 [2020-09-24 16:10:35,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:35,351 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-09-24 16:10:35,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 16:10:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-09-24 16:10:35,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 16:10:35,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:35,354 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] [2020-09-24 16:10:35,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:10:35,355 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:35,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:35,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1227098254, now seen corresponding path program 1 times [2020-09-24 16:10:35,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:35,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844114305] [2020-09-24 16:10:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:35,402 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:35,402 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:35,403 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:35,403 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:35,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 16:10:35,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:35,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 16:10:35,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:35,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:10:35,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 16:10:35,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 16:10:35,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:35,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:35,472 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:35,475 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:35,475 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:35,475 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:35,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:35,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:35,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:10:35,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:35,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:35,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:35,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:35,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 16:10:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:35,488 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:35,489 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:35,489 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:35,489 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:35,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:35,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:35,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:35,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:35,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:35,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:35,501 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 16:10:35,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844114305] [2020-09-24 16:10:35,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:35,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:10:35,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128809674] [2020-09-24 16:10:35,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:10:35,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:35,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:10:35,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:10:35,505 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 4 states. [2020-09-24 16:10:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:35,720 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2020-09-24 16:10:35,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:10:35,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-09-24 16:10:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:35,722 INFO L225 Difference]: With dead ends: 189 [2020-09-24 16:10:35,723 INFO L226 Difference]: Without dead ends: 103 [2020-09-24 16:10:35,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:10:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-24 16:10:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-09-24 16:10:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-24 16:10:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2020-09-24 16:10:35,737 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 60 [2020-09-24 16:10:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:35,738 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2020-09-24 16:10:35,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:10:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2020-09-24 16:10:35,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 16:10:35,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:35,741 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] [2020-09-24 16:10:35,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:10:35,741 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:35,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1578191403, now seen corresponding path program 1 times [2020-09-24 16:10:35,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:35,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11881156] [2020-09-24 16:10:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:35,833 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:35,834 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:35,835 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:35,835 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:35,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 16:10:35,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:35,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 16:10:35,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:35,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:10:35,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 16:10:35,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 16:10:35,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:35,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:35,968 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:35,968 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:35,969 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:35,969 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:35,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:35,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:35,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:35,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:35,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:35,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:35,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:35,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:35,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 16:10:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:35,978 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:35,978 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:35,978 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:35,978 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:35,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:35,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:35,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:35,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:35,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:35,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:35,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:35,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:35,993 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 16:10:35,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11881156] [2020-09-24 16:10:35,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:35,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 16:10:35,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239313976] [2020-09-24 16:10:35,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 16:10:35,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:35,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 16:10:35,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:35,997 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand 8 states. [2020-09-24 16:10:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:36,798 INFO L93 Difference]: Finished difference Result 474 states and 535 transitions. [2020-09-24 16:10:36,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 16:10:36,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-24 16:10:36,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:36,815 INFO L225 Difference]: With dead ends: 474 [2020-09-24 16:10:36,817 INFO L226 Difference]: Without dead ends: 381 [2020-09-24 16:10:36,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-09-24 16:10:36,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-09-24 16:10:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 145. [2020-09-24 16:10:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-24 16:10:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2020-09-24 16:10:36,882 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 62 [2020-09-24 16:10:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:36,882 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2020-09-24 16:10:36,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 16:10:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2020-09-24 16:10:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 16:10:36,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:36,889 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] [2020-09-24 16:10:36,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:10:36,889 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:36,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1116699365, now seen corresponding path program 1 times [2020-09-24 16:10:36,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:36,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915538822] [2020-09-24 16:10:36,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:36,986 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:36,986 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:36,986 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:36,986 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:36,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 16:10:36,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:36,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-24 16:10:36,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:36,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:10:36,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 16:10:36,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 16:10:36,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:37,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,151 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,151 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,151 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,152 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:37,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:37,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:37,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:37,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:37,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:37,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 16:10:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,160 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,161 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,161 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,161 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:37,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:37,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:37,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:37,171 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 16:10:37,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915538822] [2020-09-24 16:10:37,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:37,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 16:10:37,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370393161] [2020-09-24 16:10:37,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 16:10:37,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:37,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 16:10:37,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:10:37,174 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand 9 states. [2020-09-24 16:10:37,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:37,884 INFO L93 Difference]: Finished difference Result 561 states and 640 transitions. [2020-09-24 16:10:37,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 16:10:37,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-09-24 16:10:37,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:37,888 INFO L225 Difference]: With dead ends: 561 [2020-09-24 16:10:37,888 INFO L226 Difference]: Without dead ends: 429 [2020-09-24 16:10:37,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-09-24 16:10:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-09-24 16:10:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 149. [2020-09-24 16:10:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-24 16:10:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 166 transitions. [2020-09-24 16:10:37,904 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 166 transitions. Word has length 65 [2020-09-24 16:10:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:37,905 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 166 transitions. [2020-09-24 16:10:37,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 16:10:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 166 transitions. [2020-09-24 16:10:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 16:10:37,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:37,907 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] [2020-09-24 16:10:37,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:10:37,908 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:37,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:37,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1492663361, now seen corresponding path program 1 times [2020-09-24 16:10:37,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:37,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596730954] [2020-09-24 16:10:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,930 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,931 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,931 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,931 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 16:10:37,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:37,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:10:37,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-24 16:10:37,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 16:10:37,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:37,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,967 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,968 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,968 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,968 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:37,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:37,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:37,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:37,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:37,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:37,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 16:10:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,976 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,977 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,977 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,977 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:37,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:37,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:37,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:37,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:37,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:37,984 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 16:10:37,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596730954] [2020-09-24 16:10:37,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:37,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:10:37,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391393267] [2020-09-24 16:10:37,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:10:37,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:37,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:10:37,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:10:37,987 INFO L87 Difference]: Start difference. First operand 149 states and 166 transitions. Second operand 4 states. [2020-09-24 16:10:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:38,153 INFO L93 Difference]: Finished difference Result 284 states and 319 transitions. [2020-09-24 16:10:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:10:38,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-09-24 16:10:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:38,155 INFO L225 Difference]: With dead ends: 284 [2020-09-24 16:10:38,155 INFO L226 Difference]: Without dead ends: 150 [2020-09-24 16:10:38,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:10:38,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-24 16:10:38,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-09-24 16:10:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-24 16:10:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 166 transitions. [2020-09-24 16:10:38,167 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 166 transitions. Word has length 65 [2020-09-24 16:10:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:38,167 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 166 transitions. [2020-09-24 16:10:38,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:10:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 166 transitions. [2020-09-24 16:10:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 16:10:38,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:38,169 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] [2020-09-24 16:10:38,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:10:38,170 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:38,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:38,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1492389340, now seen corresponding path program 1 times [2020-09-24 16:10:38,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:38,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946314487] [2020-09-24 16:10:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:38,214 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:38,217 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:38,217 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:38,217 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:38,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 16:10:38,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:38,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 16:10:38,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:38,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:10:38,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 16:10:38,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 16:10:38,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:38,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:38,449 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:38,449 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:38,449 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:38,450 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:38,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:38,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:38,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:38,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:38,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:38,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:38,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:38,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:38,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-24 16:10:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:38,459 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:38,459 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:38,460 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:38,460 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:38,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:38,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:38,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:38,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:38,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:38,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:38,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:38,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:38,476 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 16:10:38,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946314487] [2020-09-24 16:10:38,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:38,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 16:10:38,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452624680] [2020-09-24 16:10:38,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 16:10:38,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:38,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 16:10:38,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-24 16:10:38,482 INFO L87 Difference]: Start difference. First operand 150 states and 166 transitions. Second operand 10 states. [2020-09-24 16:10:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:39,264 INFO L93 Difference]: Finished difference Result 543 states and 610 transitions. [2020-09-24 16:10:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 16:10:39,265 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-09-24 16:10:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:39,268 INFO L225 Difference]: With dead ends: 543 [2020-09-24 16:10:39,269 INFO L226 Difference]: Without dead ends: 379 [2020-09-24 16:10:39,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2020-09-24 16:10:39,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-09-24 16:10:39,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 160. [2020-09-24 16:10:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-24 16:10:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 178 transitions. [2020-09-24 16:10:39,299 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 178 transitions. Word has length 67 [2020-09-24 16:10:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:39,300 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 178 transitions. [2020-09-24 16:10:39,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 16:10:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 178 transitions. [2020-09-24 16:10:39,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 16:10:39,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:39,308 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] [2020-09-24 16:10:39,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:10:39,309 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:39,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:39,310 INFO L82 PathProgramCache]: Analyzing trace with hash 122758570, now seen corresponding path program 1 times [2020-09-24 16:10:39,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:39,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896779700] [2020-09-24 16:10:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:39,365 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:39,365 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:39,365 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:39,366 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:39,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-24 16:10:39,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:39,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 16:10:39,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:10:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 16:10:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-24 16:10:39,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:39,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:39,522 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:39,522 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:39,522 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:39,522 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:39,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:39,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:39,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:39,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:39,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:39,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:39,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:39,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:39,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 16:10:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:39,529 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:39,529 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:39,529 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:39,530 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:39,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:39,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:39,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:39,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:39,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:39,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:39,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:39,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:39,542 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 16:10:39,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896779700] [2020-09-24 16:10:39,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:39,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-24 16:10:39,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602091182] [2020-09-24 16:10:39,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 16:10:39,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:39,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 16:10:39,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:10:39,545 INFO L87 Difference]: Start difference. First operand 160 states and 178 transitions. Second operand 12 states. [2020-09-24 16:10:40,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:40,341 INFO L93 Difference]: Finished difference Result 530 states and 600 transitions. [2020-09-24 16:10:40,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 16:10:40,342 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-09-24 16:10:40,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:40,348 INFO L225 Difference]: With dead ends: 530 [2020-09-24 16:10:40,348 INFO L226 Difference]: Without dead ends: 371 [2020-09-24 16:10:40,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:10:40,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-09-24 16:10:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 181. [2020-09-24 16:10:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-09-24 16:10:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 203 transitions. [2020-09-24 16:10:40,363 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 203 transitions. Word has length 70 [2020-09-24 16:10:40,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:40,363 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 203 transitions. [2020-09-24 16:10:40,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 16:10:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 203 transitions. [2020-09-24 16:10:40,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 16:10:40,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:40,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:10:40,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:10:40,366 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:40,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:40,366 INFO L82 PathProgramCache]: Analyzing trace with hash -272178825, now seen corresponding path program 1 times [2020-09-24 16:10:40,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:40,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916463399] [2020-09-24 16:10:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:40,399 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:40,400 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:40,400 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:40,401 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:40,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 16:10:40,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:40,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:40,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:40,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:10:40,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-09-24 16:10:40,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 16:10:40,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:40,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:40,452 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:40,452 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:40,453 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:40,453 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:40,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:40,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:40,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:40,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:40,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:40,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:40,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:40,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 16:10:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:40,461 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:40,461 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:40,462 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:40,462 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:40,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:40,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:40,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:40,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:40,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:40,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:40,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:40,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:40,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916463399] [2020-09-24 16:10:40,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:40,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:10:40,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425773439] [2020-09-24 16:10:40,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:10:40,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:10:40,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:10:40,472 INFO L87 Difference]: Start difference. First operand 181 states and 203 transitions. Second operand 4 states. [2020-09-24 16:10:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:40,635 INFO L93 Difference]: Finished difference Result 328 states and 370 transitions. [2020-09-24 16:10:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:10:40,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-09-24 16:10:40,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:40,637 INFO L225 Difference]: With dead ends: 328 [2020-09-24 16:10:40,637 INFO L226 Difference]: Without dead ends: 183 [2020-09-24 16:10:40,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:10:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-24 16:10:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2020-09-24 16:10:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-09-24 16:10:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 204 transitions. [2020-09-24 16:10:40,646 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 204 transitions. Word has length 72 [2020-09-24 16:10:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:40,647 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 204 transitions. [2020-09-24 16:10:40,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:10:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 204 transitions. [2020-09-24 16:10:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 16:10:40,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:40,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:10:40,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:10:40,652 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:40,652 INFO L82 PathProgramCache]: Analyzing trace with hash 588909148, now seen corresponding path program 1 times [2020-09-24 16:10:40,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:40,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798830583] [2020-09-24 16:10:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:40,691 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:40,691 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:40,692 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:40,692 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:40,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 16:10:40,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:40,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 16:10:40,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:40,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:10:40,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 16:10:40,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-24 16:10:40,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:40,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:40,814 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:40,814 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:40,814 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:40,814 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:40,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:40,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:40,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:40,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:40,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:40,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:40,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:40,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:40,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 16:10:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:40,824 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:40,824 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:40,824 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:40,825 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:40,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:40,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:40,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:40,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:40,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:10:40,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:40,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 16:10:40,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:40,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798830583] [2020-09-24 16:10:40,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:40,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 16:10:40,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141977593] [2020-09-24 16:10:40,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 16:10:40,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:40,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 16:10:40,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-24 16:10:40,844 INFO L87 Difference]: Start difference. First operand 183 states and 204 transitions. Second operand 10 states. [2020-09-24 16:10:41,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:41,398 INFO L93 Difference]: Finished difference Result 493 states and 555 transitions. [2020-09-24 16:10:41,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 16:10:41,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-09-24 16:10:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:41,400 INFO L225 Difference]: With dead ends: 493 [2020-09-24 16:10:41,401 INFO L226 Difference]: Without dead ends: 343 [2020-09-24 16:10:41,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-09-24 16:10:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-09-24 16:10:41,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 236. [2020-09-24 16:10:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-09-24 16:10:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2020-09-24 16:10:41,412 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 72 [2020-09-24 16:10:41,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:41,413 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2020-09-24 16:10:41,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 16:10:41,413 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2020-09-24 16:10:41,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 16:10:41,414 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:41,414 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 16:10:41,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 16:10:41,415 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:41,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:41,415 INFO L82 PathProgramCache]: Analyzing trace with hash 69190993, now seen corresponding path program 1 times [2020-09-24 16:10:41,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:41,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084698461] [2020-09-24 16:10:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:41,445 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:41,445 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:41,445 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:41,446 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:41,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-24 16:10:41,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:41,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 16:10:41,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:41,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:10:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 16:10:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-24 16:10:41,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:41,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:41,547 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:41,547 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:41,547 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:41,547 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:41,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:41,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:41,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:41,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:41,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:41,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:41,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:41,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:41,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-24 16:10:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:41,555 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:41,555 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:41,555 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:41,556 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:41,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:41,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:41,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:41,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:41,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:10:41,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:41,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 16:10:41,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 16:10:41,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084698461] [2020-09-24 16:10:41,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:41,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 16:10:41,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020709260] [2020-09-24 16:10:41,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 16:10:41,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:41,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 16:10:41,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:41,581 INFO L87 Difference]: Start difference. First operand 236 states and 266 transitions. Second operand 8 states. [2020-09-24 16:10:41,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:41,996 INFO L93 Difference]: Finished difference Result 331 states and 373 transitions. [2020-09-24 16:10:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 16:10:41,996 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-09-24 16:10:41,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:41,999 INFO L225 Difference]: With dead ends: 331 [2020-09-24 16:10:41,999 INFO L226 Difference]: Without dead ends: 329 [2020-09-24 16:10:42,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:10:42,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-09-24 16:10:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 291. [2020-09-24 16:10:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-09-24 16:10:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 329 transitions. [2020-09-24 16:10:42,013 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 329 transitions. Word has length 73 [2020-09-24 16:10:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:42,014 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 329 transitions. [2020-09-24 16:10:42,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 16:10:42,014 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 329 transitions. [2020-09-24 16:10:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 16:10:42,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:42,017 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:10:42,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 16:10:42,018 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:42,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:42,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1474625812, now seen corresponding path program 1 times [2020-09-24 16:10:42,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:42,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230487818] [2020-09-24 16:10:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:42,078 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:42,079 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:42,079 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:42,079 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:42,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-24 16:10:42,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:42,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 16:10:42,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:42,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:10:42,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 16:10:42,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 16:10:42,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:42,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:42,216 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:42,216 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:42,217 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:42,217 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:42,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:42,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:42,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:42,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:42,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:42,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:42,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 16:10:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:42,228 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:42,229 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:42,229 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:42,230 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:42,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:42,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:42,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:42,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:42,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:10:42,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:42,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 16:10:42,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:42,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230487818] [2020-09-24 16:10:42,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:42,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-24 16:10:42,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723236413] [2020-09-24 16:10:42,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 16:10:42,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:42,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 16:10:42,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:10:42,253 INFO L87 Difference]: Start difference. First operand 291 states and 329 transitions. Second operand 12 states. [2020-09-24 16:10:43,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:43,095 INFO L93 Difference]: Finished difference Result 564 states and 636 transitions. [2020-09-24 16:10:43,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 16:10:43,096 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-09-24 16:10:43,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:43,104 INFO L225 Difference]: With dead ends: 564 [2020-09-24 16:10:43,104 INFO L226 Difference]: Without dead ends: 414 [2020-09-24 16:10:43,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-24 16:10:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-09-24 16:10:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 295. [2020-09-24 16:10:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-09-24 16:10:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 333 transitions. [2020-09-24 16:10:43,125 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 333 transitions. Word has length 75 [2020-09-24 16:10:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:43,126 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 333 transitions. [2020-09-24 16:10:43,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 16:10:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 333 transitions. [2020-09-24 16:10:43,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 16:10:43,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:43,129 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 16:10:43,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 16:10:43,130 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:43,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:43,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1908172287, now seen corresponding path program 1 times [2020-09-24 16:10:43,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:43,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115771317] [2020-09-24 16:10:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,173 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,173 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,174 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,174 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-24 16:10:43,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 16:10:43,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:10:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 16:10:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 16:10:43,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:43,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,270 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,271 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,271 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,272 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:43,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:43,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:43,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:43,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:43,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:43,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 16:10:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,278 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,278 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,278 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,278 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:43,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:43,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:43,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:43,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:43,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 16:10:43,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115771317] [2020-09-24 16:10:43,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:43,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 16:10:43,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439559139] [2020-09-24 16:10:43,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 16:10:43,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:43,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 16:10:43,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:43,292 INFO L87 Difference]: Start difference. First operand 295 states and 333 transitions. Second operand 8 states. [2020-09-24 16:10:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:43,733 INFO L93 Difference]: Finished difference Result 542 states and 611 transitions. [2020-09-24 16:10:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 16:10:43,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-09-24 16:10:43,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:43,737 INFO L225 Difference]: With dead ends: 542 [2020-09-24 16:10:43,738 INFO L226 Difference]: Without dead ends: 392 [2020-09-24 16:10:43,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:10:43,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-09-24 16:10:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 305. [2020-09-24 16:10:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-09-24 16:10:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 344 transitions. [2020-09-24 16:10:43,756 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 344 transitions. Word has length 76 [2020-09-24 16:10:43,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:43,757 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 344 transitions. [2020-09-24 16:10:43,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 16:10:43,757 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 344 transitions. [2020-09-24 16:10:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 16:10:43,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:43,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:10:43,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 16:10:43,760 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:43,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:43,760 INFO L82 PathProgramCache]: Analyzing trace with hash 116425250, now seen corresponding path program 1 times [2020-09-24 16:10:43,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:43,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117559465] [2020-09-24 16:10:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,779 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,779 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,779 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,780 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-24 16:10:43,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:43,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:10:43,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-09-24 16:10:43,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 16:10:43,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:43,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,827 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,827 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,828 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,828 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:43,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:43,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:43,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:43,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 16:10:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,836 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,837 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,837 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,837 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:43,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:43,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:43,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:43,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:43,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 16:10:43,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117559465] [2020-09-24 16:10:43,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:43,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:10:43,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292139053] [2020-09-24 16:10:43,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:10:43,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:10:43,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:10:43,848 INFO L87 Difference]: Start difference. First operand 305 states and 344 transitions. Second operand 5 states. [2020-09-24 16:10:44,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:44,070 INFO L93 Difference]: Finished difference Result 474 states and 534 transitions. [2020-09-24 16:10:44,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:10:44,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-09-24 16:10:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:44,073 INFO L225 Difference]: With dead ends: 474 [2020-09-24 16:10:44,074 INFO L226 Difference]: Without dead ends: 328 [2020-09-24 16:10:44,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:10:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-09-24 16:10:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 305. [2020-09-24 16:10:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-09-24 16:10:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 344 transitions. [2020-09-24 16:10:44,090 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 344 transitions. Word has length 76 [2020-09-24 16:10:44,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:44,090 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 344 transitions. [2020-09-24 16:10:44,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:10:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 344 transitions. [2020-09-24 16:10:44,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-24 16:10:44,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:44,093 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:10:44,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 16:10:44,093 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:44,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1122457453, now seen corresponding path program 1 times [2020-09-24 16:10:44,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:44,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108802977] [2020-09-24 16:10:44,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,115 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,116 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,116 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,116 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 16:10:44,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 16:10:44,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:10:44,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-09-24 16:10:44,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 16:10:44,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,170 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,171 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,171 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,171 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:44,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:44,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:44,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:44,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 16:10:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,179 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,179 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,179 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,179 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:44,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:44,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:44,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 16:10:44,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108802977] [2020-09-24 16:10:44,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:44,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 16:10:44,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274917536] [2020-09-24 16:10:44,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 16:10:44,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:44,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 16:10:44,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:10:44,191 INFO L87 Difference]: Start difference. First operand 305 states and 344 transitions. Second operand 6 states. [2020-09-24 16:10:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:44,417 INFO L93 Difference]: Finished difference Result 546 states and 614 transitions. [2020-09-24 16:10:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 16:10:44,418 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-09-24 16:10:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:44,420 INFO L225 Difference]: With dead ends: 546 [2020-09-24 16:10:44,421 INFO L226 Difference]: Without dead ends: 380 [2020-09-24 16:10:44,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-09-24 16:10:44,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 307. [2020-09-24 16:10:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-09-24 16:10:44,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 342 transitions. [2020-09-24 16:10:44,433 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 342 transitions. Word has length 77 [2020-09-24 16:10:44,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:44,434 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 342 transitions. [2020-09-24 16:10:44,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 16:10:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 342 transitions. [2020-09-24 16:10:44,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 16:10:44,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:44,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:10:44,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 16:10:44,436 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:44,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2031617893, now seen corresponding path program 1 times [2020-09-24 16:10:44,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:44,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007370284] [2020-09-24 16:10:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,458 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,459 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,459 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,459 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-24 16:10:44,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 16:10:44,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:10:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 16:10:44,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 16:10:44,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,545 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,545 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,545 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,545 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:44,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:44,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:44,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-24 16:10:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,551 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,552 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,552 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,552 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:44,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:44,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:44,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 16:10:44,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007370284] [2020-09-24 16:10:44,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:44,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 16:10:44,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000114463] [2020-09-24 16:10:44,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 16:10:44,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:44,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 16:10:44,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:44,564 INFO L87 Difference]: Start difference. First operand 307 states and 342 transitions. Second operand 8 states. [2020-09-24 16:10:44,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:44,853 INFO L93 Difference]: Finished difference Result 545 states and 605 transitions. [2020-09-24 16:10:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 16:10:44,854 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-09-24 16:10:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:44,856 INFO L225 Difference]: With dead ends: 545 [2020-09-24 16:10:44,856 INFO L226 Difference]: Without dead ends: 282 [2020-09-24 16:10:44,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:10:44,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-24 16:10:44,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 275. [2020-09-24 16:10:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-09-24 16:10:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 304 transitions. [2020-09-24 16:10:44,867 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 304 transitions. Word has length 78 [2020-09-24 16:10:44,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:44,867 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 304 transitions. [2020-09-24 16:10:44,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 16:10:44,867 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 304 transitions. [2020-09-24 16:10:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 16:10:44,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:44,869 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 16:10:44,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 16:10:44,869 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:44,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:44,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1446971750, now seen corresponding path program 1 times [2020-09-24 16:10:44,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:44,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920119791] [2020-09-24 16:10:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,896 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,896 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,897 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,897 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-24 16:10:44,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 16:10:44,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:10:44,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 16:10:44,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 16:10:44,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,976 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,977 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,977 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,977 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:44,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:44,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:44,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:44,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 16:10:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,984 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,984 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,984 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,985 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:44,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:44,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:44,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920119791] [2020-09-24 16:10:44,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:44,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 16:10:44,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836016433] [2020-09-24 16:10:44,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 16:10:44,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:44,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 16:10:44,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-24 16:10:44,997 INFO L87 Difference]: Start difference. First operand 275 states and 304 transitions. Second operand 10 states. [2020-09-24 16:10:45,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:45,420 INFO L93 Difference]: Finished difference Result 619 states and 688 transitions. [2020-09-24 16:10:45,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 16:10:45,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-09-24 16:10:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:45,426 INFO L225 Difference]: With dead ends: 619 [2020-09-24 16:10:45,427 INFO L226 Difference]: Without dead ends: 388 [2020-09-24 16:10:45,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-09-24 16:10:45,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-09-24 16:10:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 301. [2020-09-24 16:10:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-09-24 16:10:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 331 transitions. [2020-09-24 16:10:45,440 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 331 transitions. Word has length 79 [2020-09-24 16:10:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:45,440 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 331 transitions. [2020-09-24 16:10:45,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 16:10:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 331 transitions. [2020-09-24 16:10:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 16:10:45,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:45,442 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-09-24 16:10:45,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 16:10:45,442 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:45,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:45,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1723821108, now seen corresponding path program 2 times [2020-09-24 16:10:45,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:45,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099047387] [2020-09-24 16:10:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,467 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,467 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,468 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,468 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-24 16:10:45,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 16:10:45,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:10:45,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-09-24 16:10:45,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 16:10:45,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:45,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,521 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,521 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,521 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,522 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:45,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:45,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:45,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:45,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:45,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 16:10:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,529 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,529 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,529 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,529 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 16:10:45,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:45,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:45,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:45,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:45,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-24 16:10:45,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099047387] [2020-09-24 16:10:45,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:45,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 16:10:45,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270870934] [2020-09-24 16:10:45,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 16:10:45,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:45,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 16:10:45,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:10:45,540 INFO L87 Difference]: Start difference. First operand 301 states and 331 transitions. Second operand 6 states. [2020-09-24 16:10:45,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:45,855 INFO L93 Difference]: Finished difference Result 524 states and 580 transitions. [2020-09-24 16:10:45,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 16:10:45,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2020-09-24 16:10:45,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:45,859 INFO L225 Difference]: With dead ends: 524 [2020-09-24 16:10:45,860 INFO L226 Difference]: Without dead ends: 373 [2020-09-24 16:10:45,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:10:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-09-24 16:10:45,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 301. [2020-09-24 16:10:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-09-24 16:10:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 330 transitions. [2020-09-24 16:10:45,879 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 330 transitions. Word has length 90 [2020-09-24 16:10:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:45,880 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 330 transitions. [2020-09-24 16:10:45,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 16:10:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 330 transitions. [2020-09-24 16:10:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-24 16:10:45,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:45,883 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-09-24 16:10:45,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 16:10:45,883 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:45,884 INFO L82 PathProgramCache]: Analyzing trace with hash 888855281, now seen corresponding path program 1 times [2020-09-24 16:10:45,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:45,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762468068] [2020-09-24 16:10:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 16:10:45,915 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 16:10:45,916 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 16:10:45,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 16:10:45,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 04:10:45 BoogieIcfgContainer [2020-09-24 16:10:45,966 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 16:10:45,969 INFO L168 Benchmark]: Toolchain (without parser) took 12805.33 ms. Allocated memory was 138.4 MB in the beginning and 353.9 MB in the end (delta: 215.5 MB). Free memory was 100.7 MB in the beginning and 322.1 MB in the end (delta: -221.4 MB). Peak memory consumption was 229.8 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:45,970 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 16:10:45,970 INFO L168 Benchmark]: CACSL2BoogieTranslator took 541.55 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 100.0 MB in the beginning and 176.8 MB in the end (delta: -76.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:45,971 INFO L168 Benchmark]: Boogie Preprocessor took 57.81 ms. Allocated memory is still 200.8 MB. Free memory was 176.8 MB in the beginning and 174.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:45,972 INFO L168 Benchmark]: RCFGBuilder took 658.72 ms. Allocated memory is still 200.8 MB. Free memory was 174.8 MB in the beginning and 142.0 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:45,973 INFO L168 Benchmark]: TraceAbstraction took 11535.89 ms. Allocated memory was 200.8 MB in the beginning and 353.9 MB in the end (delta: 153.1 MB). Free memory was 141.3 MB in the beginning and 322.1 MB in the end (delta: -180.8 MB). Peak memory consumption was 207.9 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:45,975 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 541.55 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 100.0 MB in the beginning and 176.8 MB in the end (delta: -76.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.81 ms. Allocated memory is still 200.8 MB. Free memory was 176.8 MB in the beginning and 174.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 658.72 ms. Allocated memory is still 200.8 MB. Free memory was 174.8 MB in the beginning and 142.0 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11535.89 ms. Allocated memory was 200.8 MB in the beginning and 353.9 MB in the end (delta: 153.1 MB). Free memory was 141.3 MB in the beginning and 322.1 MB in the end (delta: -180.8 MB). Peak memory consumption was 207.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 [L76] CALL parse_expression_list (A) [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; [L50] COND FALSE !(!str) [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j [L61] CALL r_strncpy(str2, str+start, j-start+1) [L30] return strncpy(dest,src,n); [L61] RET r_strncpy(str2, str+start, j-start+1) [L62] CALL __VERIFIER_assert(j - start + 1 < 2) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 123 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.4s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 7.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2082 SDtfs, 3373 SDslu, 6818 SDs, 0 SdLazy, 4904 SolverSat, 259 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=307occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 1538 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 1297 NumberOfCodeBlocks, 1297 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1188 ConstructedInterpolants, 0 QuantifiedInterpolants, 184117 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 16 PerfectInterpolantSequences, 58/64 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...