/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options 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/loop-industry-pattern/ofuf_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:32:41,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:32:41,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:32:41,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:32:41,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:32:41,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:32:41,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:32:41,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:32:41,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:32:41,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:32:41,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:32:41,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:32:41,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:32:41,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:32:41,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:32:41,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:32:41,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:32:41,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:32:41,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:32:41,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:32:41,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:32:41,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:32:41,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:32:41,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:32:41,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:32:41,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:32:41,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:32:41,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:32:41,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:32:41,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:32:41,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:32:41,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:32:41,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:32:41,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:32:41,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:32:41,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:32:41,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:32:41,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:32:41,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:32:41,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:32:41,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:32:41,472 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 [2020-09-21 11:32:41,512 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:32:41,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:32:41,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:32:41,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:32:41,515 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:32:41,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:32:41,515 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:32:41,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:32:41,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:32:41,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:32:41,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:32:41,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:32:41,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:32:41,517 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:32:41,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:32:41,517 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:32:41,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:32:41,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:32:41,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:32:41,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:32:41,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:32:41,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:32:41,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:32:41,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:32:41,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:32:41,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:32:41,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:32:41,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:32:41,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:32:41,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> 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; [2020-09-21 11:32:41,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:32:41,979 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:32:41,984 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:32:41,986 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:32:41,986 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:32:41,988 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_4.c [2020-09-21 11:32:42,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6973d8eca/667d751e561a4ec891c29747adb15ddc/FLAGcca07f948 [2020-09-21 11:32:42,712 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:32:42,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/ofuf_4.c [2020-09-21 11:32:42,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6973d8eca/667d751e561a4ec891c29747adb15ddc/FLAGcca07f948 [2020-09-21 11:32:42,983 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6973d8eca/667d751e561a4ec891c29747adb15ddc [2020-09-21 11:32:42,996 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:32:43,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:32:43,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:43,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:32:43,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:32:43,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:42" (1/1) ... [2020-09-21 11:32:43,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ccd168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:43, skipping insertion in model container [2020-09-21 11:32:43,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:42" (1/1) ... [2020-09-21 11:32:43,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:32:43,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:32:43,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:43,572 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:32:43,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:43,672 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:32:43,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:43 WrapperNode [2020-09-21 11:32:43,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:43,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:32:43,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:32:43,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:32:43,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:43" (1/1) ... [2020-09-21 11:32:43,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:43" (1/1) ... [2020-09-21 11:32:43,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:43" (1/1) ... [2020-09-21 11:32:43,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:43" (1/1) ... [2020-09-21 11:32:43,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:43" (1/1) ... [2020-09-21 11:32:43,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:43" (1/1) ... [2020-09-21 11:32:43,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:43" (1/1) ... [2020-09-21 11:32:43,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:32:43,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:32:43,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:32:43,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:32:43,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:43" (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 [2020-09-21 11:32:43,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:32:43,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:32:43,886 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:32:43,886 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-09-21 11:32:43,886 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_89 [2020-09-21 11:32:43,886 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_92 [2020-09-21 11:32:43,887 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_95 [2020-09-21 11:32:43,887 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_96 [2020-09-21 11:32:43,887 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_97 [2020-09-21 11:32:43,887 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_99 [2020-09-21 11:32:43,887 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_100 [2020-09-21 11:32:43,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:32:43,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:32:43,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:32:43,888 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:32:43,889 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:32:43,889 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-09-21 11:32:43,889 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-21 11:32:43,889 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-21 11:32:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_92 [2020-09-21 11:32:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_95 [2020-09-21 11:32:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_96 [2020-09-21 11:32:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_97 [2020-09-21 11:32:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 11:32:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_99 [2020-09-21 11:32:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_100 [2020-09-21 11:32:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-21 11:32:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:32:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:32:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:32:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 11:32:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:32:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 11:32:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:32:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:32:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 11:32:43,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 11:32:43,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:32:43,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-21 11:32:43,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:32:45,038 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:32:45,039 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-09-21 11:32:45,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:45 BoogieIcfgContainer [2020-09-21 11:32:45,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:32:45,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:32:45,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:32:45,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:32:45,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:32:42" (1/3) ... [2020-09-21 11:32:45,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6847ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:45, skipping insertion in model container [2020-09-21 11:32:45,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:43" (2/3) ... [2020-09-21 11:32:45,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6847ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:45, skipping insertion in model container [2020-09-21 11:32:45,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:45" (3/3) ... [2020-09-21 11:32:45,055 INFO L109 eAbstractionObserver]: Analyzing ICFG ofuf_4.c [2020-09-21 11:32:45,067 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:32:45,077 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:32:45,096 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:32:45,123 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:32:45,124 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:32:45,124 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:32:45,124 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:32:45,124 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:32:45,125 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:32:45,125 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:32:45,125 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:32:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states. [2020-09-21 11:32:45,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 11:32:45,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:45,168 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] [2020-09-21 11:32:45,168 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:45,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:45,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1328586124, now seen corresponding path program 1 times [2020-09-21 11:32:45,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:45,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764155158] [2020-09-21 11:32:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:45,596 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:45,596 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:45,597 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:45,597 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:45,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 11:32:45,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:45,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-21 11:32:45,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:45,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 11:32:45,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:32:45,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:45,862 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-09-21 11:32:45,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:45,874 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:45,874 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:45,875 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:45,875 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:45,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:45,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:45,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:45,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:45,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:45,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:45,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:45,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:45,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:32:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:45,953 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:45,953 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:45,954 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:45,954 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:45,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 11:32:45,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:45,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 11:32:45,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:45,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:32:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:32:45,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:46,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 11:32:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:46,014 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:46,015 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:46,015 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:46,015 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:46,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:32:46,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:46,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:46,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:46,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:46,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:32:46,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:46,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:46,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 11:32:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:46,037 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:46,037 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:46,037 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:46,038 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:46,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:46,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:46,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:46,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:46,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:46,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 11:32:46,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:46,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-21 11:32:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:46,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764155158] [2020-09-21 11:32:46,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:46,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:32:46,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597695174] [2020-09-21 11:32:46,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:46,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:46,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:46,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:46,100 INFO L87 Difference]: Start difference. First operand 129 states. Second operand 5 states. [2020-09-21 11:32:46,272 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 11:32:47,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:47,400 INFO L93 Difference]: Finished difference Result 266 states and 409 transitions. [2020-09-21 11:32:47,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:32:47,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-09-21 11:32:47,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:47,420 INFO L225 Difference]: With dead ends: 266 [2020-09-21 11:32:47,420 INFO L226 Difference]: Without dead ends: 141 [2020-09-21 11:32:47,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:47,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-21 11:32:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2020-09-21 11:32:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-21 11:32:47,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 168 transitions. [2020-09-21 11:32:47,518 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 168 transitions. Word has length 43 [2020-09-21 11:32:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:47,518 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 168 transitions. [2020-09-21 11:32:47,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 168 transitions. [2020-09-21 11:32:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 11:32:47,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:47,523 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] [2020-09-21 11:32:47,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:32:47,523 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:47,524 INFO L82 PathProgramCache]: Analyzing trace with hash -294008176, now seen corresponding path program 1 times [2020-09-21 11:32:47,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:47,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488918489] [2020-09-21 11:32:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:47,601 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:47,601 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:47,601 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:47,602 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:47,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 11:32:47,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:47,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:32:47,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:47,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:32:47,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 11:32:47,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:32:47,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:47,780 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-09-21 11:32:47,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:47,788 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:47,788 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:47,789 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:47,789 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:47,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:47,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:47,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:47,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:47,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:47,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:47,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:47,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:47,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:32:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:47,857 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:47,857 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:47,857 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:47,858 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:47,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-21 11:32:47,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:47,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 11:32:47,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:47,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:32:47,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:32:47,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:32:47,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:47,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:32:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:47,913 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:47,913 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:47,913 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:47,913 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:47,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:32:47,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:47,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:47,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:47,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:47,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:32:47,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:47,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:47,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 11:32:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:47,920 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:47,921 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:47,921 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:47,921 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:47,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:47,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:47,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:47,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:47,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:47,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:32:47,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:47,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:47,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488918489] [2020-09-21 11:32:47,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:47,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:32:47,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824928044] [2020-09-21 11:32:47,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:32:47,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:47,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:32:47,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:47,938 INFO L87 Difference]: Start difference. First operand 121 states and 168 transitions. Second operand 6 states. [2020-09-21 11:32:48,074 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 11:32:49,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:49,250 INFO L93 Difference]: Finished difference Result 267 states and 385 transitions. [2020-09-21 11:32:49,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:32:49,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-09-21 11:32:49,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:49,253 INFO L225 Difference]: With dead ends: 267 [2020-09-21 11:32:49,254 INFO L226 Difference]: Without dead ends: 162 [2020-09-21 11:32:49,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:49,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-21 11:32:49,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 123. [2020-09-21 11:32:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-21 11:32:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 170 transitions. [2020-09-21 11:32:49,281 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 170 transitions. Word has length 45 [2020-09-21 11:32:49,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:49,281 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 170 transitions. [2020-09-21 11:32:49,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:32:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 170 transitions. [2020-09-21 11:32:49,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 11:32:49,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:49,284 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] [2020-09-21 11:32:49,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:32:49,285 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:49,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:49,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1235066606, now seen corresponding path program 2 times [2020-09-21 11:32:49,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:49,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894589295] [2020-09-21 11:32:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,358 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,358 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,358 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,359 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-21 11:32:49,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:32:49,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:49,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 11:32:49,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:32:49,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,497 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,498 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,498 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,498 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:49,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:49,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:49,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:49,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:49,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:32:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,566 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,567 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,567 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,567 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-21 11:32:49,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:32:49,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:49,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:32:49,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:32:49,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 11:32:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,647 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,647 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,647 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,648 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:32:49,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:49,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:49,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:32:49,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:49,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:49,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-21 11:32:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:49,656 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:49,656 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:49,656 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:49,657 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:49,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:49,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:49,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:49,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:49,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:49,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:32:49,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:49,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:49,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894589295] [2020-09-21 11:32:49,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:49,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:32:49,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251387976] [2020-09-21 11:32:49,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:32:49,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:49,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:32:49,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:49,671 INFO L87 Difference]: Start difference. First operand 123 states and 170 transitions. Second operand 7 states. [2020-09-21 11:32:49,826 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 11:32:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:51,295 INFO L93 Difference]: Finished difference Result 288 states and 418 transitions. [2020-09-21 11:32:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:32:51,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-09-21 11:32:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:51,298 INFO L225 Difference]: With dead ends: 288 [2020-09-21 11:32:51,298 INFO L226 Difference]: Without dead ends: 183 [2020-09-21 11:32:51,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:32:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-21 11:32:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 125. [2020-09-21 11:32:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-21 11:32:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2020-09-21 11:32:51,321 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 47 [2020-09-21 11:32:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:51,321 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2020-09-21 11:32:51,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:32:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2020-09-21 11:32:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 11:32:51,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:51,324 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-09-21 11:32:51,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:32:51,324 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:51,325 INFO L82 PathProgramCache]: Analyzing trace with hash 636445864, now seen corresponding path program 1 times [2020-09-21 11:32:51,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:51,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366261571] [2020-09-21 11:32:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:51,403 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:51,405 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:51,407 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:51,407 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:51,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-21 11:32:51,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:51,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-21 11:32:51,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:32:51,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 11:32:51,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:32:51,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:51,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:51,564 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:51,565 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:51,565 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:51,565 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:51,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:51,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:51,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:51,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:51,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:51,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:51,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:51,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:51,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:32:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:51,644 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:51,645 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:51,645 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:51,646 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:51,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:32:51,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:51,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-21 11:32:51,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:51,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:32:51,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:32:51,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:32:51,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:51,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 11:32:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:51,738 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:51,739 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:51,740 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:51,740 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:51,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:32:51,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:51,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:51,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:51,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:51,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:32:51,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:51,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:51,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 11:32:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:51,749 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:51,749 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:51,750 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:51,750 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:51,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:51,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:51,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:51,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:51,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:51,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:32:51,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:51,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 11:32:51,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366261571] [2020-09-21 11:32:51,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:51,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:32:51,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519677473] [2020-09-21 11:32:51,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:32:51,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:51,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:32:51,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:32:51,766 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand 8 states. [2020-09-21 11:32:51,885 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 11:32:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:53,473 INFO L93 Difference]: Finished difference Result 309 states and 451 transitions. [2020-09-21 11:32:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:32:53,473 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-09-21 11:32:53,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:53,476 INFO L225 Difference]: With dead ends: 309 [2020-09-21 11:32:53,476 INFO L226 Difference]: Without dead ends: 204 [2020-09-21 11:32:53,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:32:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-21 11:32:53,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 127. [2020-09-21 11:32:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-21 11:32:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2020-09-21 11:32:53,499 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 53 [2020-09-21 11:32:53,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:53,500 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2020-09-21 11:32:53,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:32:53,500 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2020-09-21 11:32:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 11:32:53,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:53,502 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-09-21 11:32:53,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:32:53,503 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:53,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:53,503 INFO L82 PathProgramCache]: Analyzing trace with hash -375236310, now seen corresponding path program 2 times [2020-09-21 11:32:53,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:53,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619694394] [2020-09-21 11:32:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:53,562 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:53,562 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:53,562 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:53,562 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:53,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-21 11:32:53,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:53,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:32:53,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:53,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 11:32:53,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:32:53,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:53,730 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-09-21 11:32:53,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:53,739 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:53,739 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:53,739 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:53,739 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:53,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:53,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:53,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:32:53,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:53,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:53,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:53,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:53,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:53,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:32:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:53,798 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:53,798 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:53,799 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:53,799 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:53,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 11:32:53,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:53,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:32:53,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:32:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:32:53,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:53,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 11:32:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:53,855 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:53,855 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:53,856 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:53,856 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:53,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:32:53,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:53,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:53,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:32:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:53,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:53,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 11:32:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:53,862 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:53,862 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:53,863 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:53,863 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:53,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:53,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:53,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:53,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:53,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:53,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:32:53,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:53,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-21 11:32:53,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619694394] [2020-09-21 11:32:53,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:53,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:32:53,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035272116] [2020-09-21 11:32:53,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:53,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:53,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:53,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:53,876 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand 5 states. [2020-09-21 11:32:54,041 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 11:32:54,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:54,887 INFO L93 Difference]: Finished difference Result 178 states and 240 transitions. [2020-09-21 11:32:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:32:54,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-09-21 11:32:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:54,890 INFO L225 Difference]: With dead ends: 178 [2020-09-21 11:32:54,890 INFO L226 Difference]: Without dead ends: 135 [2020-09-21 11:32:54,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:54,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-21 11:32:54,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 127. [2020-09-21 11:32:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-21 11:32:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 173 transitions. [2020-09-21 11:32:54,907 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 173 transitions. Word has length 55 [2020-09-21 11:32:54,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:54,908 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 173 transitions. [2020-09-21 11:32:54,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 173 transitions. [2020-09-21 11:32:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 11:32:54,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:54,910 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-09-21 11:32:54,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:32:54,910 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:54,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:54,910 INFO L82 PathProgramCache]: Analyzing trace with hash -7587439, now seen corresponding path program 1 times [2020-09-21 11:32:54,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:54,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588053267] [2020-09-21 11:32:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:54,960 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:54,960 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:54,960 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:54,960 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:54,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-21 11:32:54,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:54,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:54,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:54,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:54,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-09-21 11:32:54,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:32:54,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:55,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:55,100 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:55,100 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:55,100 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:55,100 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:55,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:55,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:55,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:55,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:55,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:55,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:55,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:55,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:55,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:32:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:55,146 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:55,146 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:55,146 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:55,147 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:55,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 11:32:55,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:55,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:55,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:55,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:55,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:32:55,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:32:55,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:55,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 11:32:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:55,183 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:55,184 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:55,184 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:55,184 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:55,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:32:55,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:55,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:32:55,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:55,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:55,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:32:55,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:55,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:55,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 11:32:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:55,188 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:55,188 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:55,188 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:55,189 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:55,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:55,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:55,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:32:55,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:55,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:55,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:32:55,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:55,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-21 11:32:55,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588053267] [2020-09-21 11:32:55,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:55,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:32:55,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456354897] [2020-09-21 11:32:55,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:55,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:55,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:55,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:55,198 INFO L87 Difference]: Start difference. First operand 127 states and 173 transitions. Second operand 5 states. [2020-09-21 11:32:55,316 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 11:32:56,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:56,238 INFO L93 Difference]: Finished difference Result 188 states and 256 transitions. [2020-09-21 11:32:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:32:56,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-09-21 11:32:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:56,240 INFO L225 Difference]: With dead ends: 188 [2020-09-21 11:32:56,240 INFO L226 Difference]: Without dead ends: 145 [2020-09-21 11:32:56,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:56,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-21 11:32:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 128. [2020-09-21 11:32:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-21 11:32:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 174 transitions. [2020-09-21 11:32:56,256 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 174 transitions. Word has length 56 [2020-09-21 11:32:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:56,256 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 174 transitions. [2020-09-21 11:32:56,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 174 transitions. [2020-09-21 11:32:56,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 11:32:56,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:56,258 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:56,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:32:56,258 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:56,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:56,259 INFO L82 PathProgramCache]: Analyzing trace with hash -360729933, now seen corresponding path program 1 times [2020-09-21 11:32:56,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:56,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709603484] [2020-09-21 11:32:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:56,308 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:56,309 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:56,309 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:56,309 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:56,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-21 11:32:56,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:56,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:56,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:56,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:56,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-21 11:32:56,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:32:56,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:56,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:56,464 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:56,465 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:56,465 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:56,465 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:56,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:56,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:56,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:56,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:56,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:56,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:56,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:56,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:56,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:32:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:56,503 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:56,504 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:56,506 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:56,506 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:56,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:32:56,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:56,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:32:56,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:56,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:56,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:56,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:56,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:56,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 11:32:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:56,522 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:56,522 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:56,522 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:56,522 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:56,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:56,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:56,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:56,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:56,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:56,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:56,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:56,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:56,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 11:32:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:56,530 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:56,530 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:56,530 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:56,530 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:56,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:32:56,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:56,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:56,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:56,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:56,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:32:56,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:56,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:56,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-21 11:32:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:56,537 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:56,537 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:56,537 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:56,537 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:56,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:56,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:56,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:56,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:56,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:56,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:32:56,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:56,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 11:32:56,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709603484] [2020-09-21 11:32:56,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:56,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:32:56,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487372020] [2020-09-21 11:32:56,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:56,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:56,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:56,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:56,551 INFO L87 Difference]: Start difference. First operand 128 states and 174 transitions. Second operand 5 states. [2020-09-21 11:32:56,677 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 11:32:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:57,445 INFO L93 Difference]: Finished difference Result 167 states and 223 transitions. [2020-09-21 11:32:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:32:57,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-09-21 11:32:57,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:57,451 INFO L225 Difference]: With dead ends: 167 [2020-09-21 11:32:57,452 INFO L226 Difference]: Without dead ends: 132 [2020-09-21 11:32:57,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-21 11:32:57,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-09-21 11:32:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-21 11:32:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 175 transitions. [2020-09-21 11:32:57,464 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 175 transitions. Word has length 57 [2020-09-21 11:32:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:57,464 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 175 transitions. [2020-09-21 11:32:57,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 175 transitions. [2020-09-21 11:32:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 11:32:57,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:57,466 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:57,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:32:57,466 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:57,467 INFO L82 PathProgramCache]: Analyzing trace with hash 450483994, now seen corresponding path program 1 times [2020-09-21 11:32:57,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:57,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098398892] [2020-09-21 11:32:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:57,520 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:57,521 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:57,521 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:57,521 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:57,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-21 11:32:57,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:57,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:32:57,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:57,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:32:57,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-21 11:32:57,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:32:57,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:57,706 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-09-21 11:32:57,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:57,715 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:57,715 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:57,715 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:57,715 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:57,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:57,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:57,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:57,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:57,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:57,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:57,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:57,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:57,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:32:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:57,762 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:57,762 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:57,762 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:57,763 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:57,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:32:57,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:57,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:57,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:57,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:57,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:57,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:57,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:57,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 11:32:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:57,782 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:57,782 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:57,783 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:57,783 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:57,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:57,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:57,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:57,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:57,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:57,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 11:32:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:57,792 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:57,792 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:57,792 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:57,792 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:57,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:32:57,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:57,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:57,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:57,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:57,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:32:57,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:57,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:57,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-21 11:32:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:57,798 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:57,798 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:57,799 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:57,799 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:57,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:57,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:57,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:57,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:57,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:57,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:32:57,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:57,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 11:32:57,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098398892] [2020-09-21 11:32:57,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:57,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:32:57,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288384230] [2020-09-21 11:32:57,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:32:57,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:57,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:32:57,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:57,819 INFO L87 Difference]: Start difference. First operand 129 states and 175 transitions. Second operand 6 states. [2020-09-21 11:32:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:58,852 INFO L93 Difference]: Finished difference Result 171 states and 229 transitions. [2020-09-21 11:32:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:32:58,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-09-21 11:32:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:58,856 INFO L225 Difference]: With dead ends: 171 [2020-09-21 11:32:58,856 INFO L226 Difference]: Without dead ends: 136 [2020-09-21 11:32:58,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:58,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-21 11:32:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2020-09-21 11:32:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-21 11:32:58,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2020-09-21 11:32:58,871 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 61 [2020-09-21 11:32:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:58,871 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2020-09-21 11:32:58,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:32:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2020-09-21 11:32:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 11:32:58,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:58,873 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-09-21 11:32:58,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:32:58,873 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:58,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:58,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1892847615, now seen corresponding path program 2 times [2020-09-21 11:32:58,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:58,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845574445] [2020-09-21 11:32:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:58,936 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:58,936 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:58,936 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:58,937 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:58,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-21 11:32:58,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:58,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:32:58,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-21 11:32:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:32:58,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:59,219 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-09-21 11:32:59,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:59,226 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:59,226 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:59,226 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:59,226 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:59,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:59,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:59,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:59,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:59,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:59,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:59,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:59,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:59,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:32:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:59,260 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:59,260 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:59,260 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:59,261 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:59,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:32:59,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:59,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:59,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:59,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:59,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 11:32:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:59,276 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:59,276 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:59,276 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:59,276 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:59,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:59,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:59,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:59,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:59,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:59,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:59,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 11:32:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:59,286 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:59,286 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:59,286 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:59,287 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:59,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:32:59,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:59,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:59,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:59,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:59,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:32:59,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:59,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:59,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-21 11:32:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:59,292 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:59,293 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:59,293 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:59,293 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:59,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:59,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:59,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:59,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:59,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:59,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:32:59,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:59,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 11:32:59,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845574445] [2020-09-21 11:32:59,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:59,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:32:59,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290346385] [2020-09-21 11:32:59,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:32:59,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:59,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:32:59,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:59,307 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand 7 states. [2020-09-21 11:33:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:02,484 INFO L93 Difference]: Finished difference Result 176 states and 236 transitions. [2020-09-21 11:33:02,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:33:02,485 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-09-21 11:33:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:02,487 INFO L225 Difference]: With dead ends: 176 [2020-09-21 11:33:02,487 INFO L226 Difference]: Without dead ends: 141 [2020-09-21 11:33:02,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:33:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-21 11:33:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2020-09-21 11:33:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-21 11:33:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 187 transitions. [2020-09-21 11:33:02,501 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 187 transitions. Word has length 65 [2020-09-21 11:33:02,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:02,502 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 187 transitions. [2020-09-21 11:33:02,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:33:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 187 transitions. [2020-09-21 11:33:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-21 11:33:02,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:02,504 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:02,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:33:02,504 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:02,505 INFO L82 PathProgramCache]: Analyzing trace with hash 212614504, now seen corresponding path program 3 times [2020-09-21 11:33:02,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:02,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416685086] [2020-09-21 11:33:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:02,568 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:02,569 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:02,569 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:02,569 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:02,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-21 11:33:02,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:02,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:33:02,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:33:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-21 11:33:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:33:02,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:02,785 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-09-21 11:33:02,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:02,792 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:02,792 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:02,792 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:02,792 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:02,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:02,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:02,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:02,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:02,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:02,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:02,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:02,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:33:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:02,838 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:02,838 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:02,839 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:02,839 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:02,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:33:02,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:02,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:02,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:02,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:02,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 11:33:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:02,856 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:02,856 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:02,857 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:02,857 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:02,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:02,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:02,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:02,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:02,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:02,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 11:33:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:02,865 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:02,865 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:02,866 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:02,866 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:02,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:33:02,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:02,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:02,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:02,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:02,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:33:02,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:02,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:02,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-21 11:33:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:02,873 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:02,874 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:02,874 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:02,874 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:02,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:02,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:02,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:02,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:02,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:02,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:33:02,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:02,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 11:33:02,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416685086] [2020-09-21 11:33:02,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:02,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:33:02,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358779197] [2020-09-21 11:33:02,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:33:02,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:02,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:33:02,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:33:02,891 INFO L87 Difference]: Start difference. First operand 137 states and 187 transitions. Second operand 8 states. [2020-09-21 11:33:03,009 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 11:33:04,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:04,030 INFO L93 Difference]: Finished difference Result 179 states and 241 transitions. [2020-09-21 11:33:04,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:33:04,031 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-09-21 11:33:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:04,033 INFO L225 Difference]: With dead ends: 179 [2020-09-21 11:33:04,033 INFO L226 Difference]: Without dead ends: 144 [2020-09-21 11:33:04,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:33:04,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-21 11:33:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2020-09-21 11:33:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-21 11:33:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 193 transitions. [2020-09-21 11:33:04,049 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 193 transitions. Word has length 69 [2020-09-21 11:33:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:04,049 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 193 transitions. [2020-09-21 11:33:04,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:33:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 193 transitions. [2020-09-21 11:33:04,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-21 11:33:04,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:04,053 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:04,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:33:04,054 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:04,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:04,056 INFO L82 PathProgramCache]: Analyzing trace with hash -374866097, now seen corresponding path program 4 times [2020-09-21 11:33:04,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:04,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217618149] [2020-09-21 11:33:04,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:04,126 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-21 11:33:04,126 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-09-21 11:33:04,126 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:33:04,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:33:04,183 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-21 11:33:04,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:33:04 BoogieIcfgContainer [2020-09-21 11:33:04,185 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:33:04,188 INFO L168 Benchmark]: Toolchain (without parser) took 21189.54 ms. Allocated memory was 146.3 MB in the beginning and 461.4 MB in the end (delta: 315.1 MB). Free memory was 100.1 MB in the beginning and 281.8 MB in the end (delta: -181.6 MB). Peak memory consumption was 133.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:04,194 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 146.3 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-21 11:33:04,194 INFO L168 Benchmark]: CACSL2BoogieTranslator took 670.98 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 99.5 MB in the beginning and 173.3 MB in the end (delta: -73.8 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:04,200 INFO L168 Benchmark]: Boogie Preprocessor took 99.17 ms. Allocated memory is still 202.9 MB. Free memory was 173.3 MB in the beginning and 168.7 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:04,200 INFO L168 Benchmark]: RCFGBuilder took 1272.13 ms. Allocated memory is still 202.9 MB. Free memory was 168.7 MB in the beginning and 106.6 MB in the end (delta: 62.1 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:04,205 INFO L168 Benchmark]: TraceAbstraction took 19138.70 ms. Allocated memory was 202.9 MB in the beginning and 461.4 MB in the end (delta: 258.5 MB). Free memory was 105.9 MB in the beginning and 281.8 MB in the end (delta: -175.8 MB). Peak memory consumption was 82.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:04,209 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 146.3 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 670.98 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 99.5 MB in the beginning and 173.3 MB in the end (delta: -73.8 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 99.17 ms. Allocated memory is still 202.9 MB. Free memory was 173.3 MB in the beginning and 168.7 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1272.13 ms. Allocated memory is still 202.9 MB. Free memory was 168.7 MB in the beginning and 106.6 MB in the end (delta: 62.1 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19138.70 ms. Allocated memory was 202.9 MB in the beginning and 461.4 MB in the end (delta: 258.5 MB). Free memory was 105.9 MB in the beginning and 281.8 MB in the end (delta: -175.8 MB). Peak memory consumption was 82.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 461]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L179] unsigned int Id_MCDC_104; [L180] UINT16 Id_MCDC_105; [L181] UINT16 Id_MCDC_106; [L182] Od_IndexTable* Id_MCDC_107; [L183] Od_IndexTable* Id_MCDC_108; [L184] Od_IndexTable* Id_MCDC_109; [L185] Od_IndexTable* Id_MCDC_110; [L186] Od_IndexTable* Id_MCDC_111; [L187] UINT32 Id_MCDC_112 [4]; [L188] CanOpenNode Id_MCDC_113; [L189] UINT32 Id_MCDC_114=0; [L427] void * Id_MCDC_143; [L428] void * Id_MCDC_144; [L429] void * Id_MCDC_145; [L430] void * Id_MCDC_146; [L431] void * Id_MCDC_147; [L432] void * Id_MCDC_148; [L433] int Id_MCDC_149; [L434] int Id_MCDC_150; [L435] int Id_MCDC_151; [L436] int Id_MCDC_152; [L437] int Id_MCDC_153; [L438] int Id_MCDC_154; [L439] int Id_MCDC_155; [L440] short Id_MCDC_156; [L441] short Id_MCDC_157; [L442] FILE* Id_MCDC_158; [L443] unsigned short Id_MCDC_159; [L444] unsigned short Id_MCDC_160; [L445] unsigned short Id_MCDC_161=0; [L446] unsigned short Id_MCDC_162=0; [L447] char Id_MCDC_163; [L448] char Id_MCDC_164; [L449] Id_MCDC_158 = fopen("in.eds", "r") [L450] COND FALSE !(Id_MCDC_158 == (( void * ) 0)) [L455] CALL Id_MCDC_100() [L420] int Id_MCDC_141; [L421] void * Id_MCDC_142; [L422] CALL Id_MCDC_99() [L400] CHAR Id_MCDC_139 [4]={0, 0, 0, 0}; [L401] UINT32 Id_MCDC_140=0; [L402] Id_MCDC_113.Id_MCDC_66 = ( PDO_Buffer* ) malloc(372) [L403] CALL Id_MCDC_97() [L331] UINT32 Id_MCDC_123; [L332] UINT32 Id_MCDC_124; [L333] UINT32 Id_MCDC_125; [L334] UINT32 Id_MCDC_126; [L335] UINT32 Id_MCDC_127; [L336] UINT32 Id_MCDC_128=0x00; [L337] UINT16 Id_MCDC_129; [L338] UINT32 Id_MCDC_130=0x00; [L339] UINT32 Id_MCDC_131=0x00; [L340] UINT8 Id_MCDC_35=0; [L341] UINT8 Id_MCDC_132=0; [L342] UINT8 Id_MCDC_36=0; [L343] UINT8 Id_MCDC_133=0; [L344] UINT8 Id_MCDC_134=0x00; [L345] INT32 Id_MCDC_135; [L346] void * Id_MCDC_136; [L347] UINT32* Id_MCDC_137; [L348] UINT16 Id_MCDC_138; [L349] Id_MCDC_123 = 0x1800 [L350] Id_MCDC_132 = 0 [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND FALSE !(Id_MCDC_132 < 4) [L354] COND TRUE Id_MCDC_123 <= 0x1803 [L356] Id_MCDC_138 = 0 [L356] COND TRUE Id_MCDC_138 < 4 [L358] Id_MCDC_126 = Id_MCDC_123 [L359] CALL, EXPR Id_MCDC_89(Id_MCDC_123, 1, & Id_MCDC_131, & Id_MCDC_130, & Id_MCDC_135, ( void * ) & Id_MCDC_128, 0) [L193] UINT32 Id_MCDC_115=0x80000000; [L194] Od_IndexTable* Id_MCDC_116; [L195] Id_MCDC_116 = Id_MCDC_111 [L196] COND TRUE Id_MCDC_116 == (( void * ) 0) [L198] return 0x08000023; [L359] RET, EXPR Id_MCDC_89(Id_MCDC_123, 1, & Id_MCDC_131, & Id_MCDC_130, & Id_MCDC_135, ( void * ) & Id_MCDC_128, 0) [L359] COND TRUE Id_MCDC_89(Id_MCDC_123, 1, & Id_MCDC_131, & Id_MCDC_130, & Id_MCDC_135, ( void * ) & Id_MCDC_128, 0) != 0x00 [L361] return 0xFFFF; [L336] UINT32 Id_MCDC_128=0x00; [L361] return 0xFFFF; [L338] UINT32 Id_MCDC_130=0x00; [L361] return 0xFFFF; [L339] UINT32 Id_MCDC_131=0x00; [L361] return 0xFFFF; [L361] return 0xFFFF; [L361] return 0xFFFF; [L403] RET Id_MCDC_97() [L404] Id_MCDC_140 = 0 [L404] COND TRUE Id_MCDC_140 < 4 [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] COND TRUE (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L408] EXPR Id_MCDC_113.Id_MCDC_66 [L408] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L408] Id_MCDC_139[Id_MCDC_140] = Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L404] Id_MCDC_140++ [L404] COND TRUE Id_MCDC_140 < 4 [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] COND TRUE (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L408] EXPR Id_MCDC_113.Id_MCDC_66 [L408] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L408] Id_MCDC_139[Id_MCDC_140] = Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L404] Id_MCDC_140++ [L404] COND TRUE Id_MCDC_140 < 4 [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] COND TRUE (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L408] EXPR Id_MCDC_113.Id_MCDC_66 [L408] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L408] Id_MCDC_139[Id_MCDC_140] = Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L404] Id_MCDC_140++ [L404] COND TRUE Id_MCDC_140 < 4 [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] COND TRUE (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L408] EXPR Id_MCDC_113.Id_MCDC_66 [L408] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L408] Id_MCDC_139[Id_MCDC_140] = Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L404] Id_MCDC_140++ [L404] COND FALSE !(Id_MCDC_140 < 4) [L415] CALL Id_MCDC_95(4, Id_MCDC_139) [L280] UINT32 Id_MCDC_121=0; [L281] UINT32 Id_MCDC_122=0; [L282] COND FALSE !(Id_MCDC_93 < 2) [L286] COND FALSE !(Id_MCDC_93 != 2) [L292] EXPR Id_MCDC_94[1] [L292] Id_MCDC_122 = Id_MCDC_94[1] [L294] EXPR Id_MCDC_94[0] [L294] CALL, EXPR Id_MCDC_92(Id_MCDC_94[0], Id_MCDC_122) [L249] UINT32 Id_MCDC_117=0; [L250] UINT32 Id_MCDC_118=0; [L251] UINT32 Id_MCDC_119=1; [L252] UINT32 Id_MCDC_120=0; [L253] COND FALSE !(Id_MCDC_90 > Id_MCDC_91) [L259] COND FALSE !(Id_MCDC_90 < Id_MCDC_91) [L266] return Id_MCDC_90; [L294] RET, EXPR Id_MCDC_92(Id_MCDC_94[0], Id_MCDC_122) [L294] Id_MCDC_121 = Id_MCDC_92(Id_MCDC_94[0], Id_MCDC_122) [L295] CALL avoid_zero(Id_MCDC_121 != 0) [L9] COND FALSE !(!y) [L295] RET avoid_zero(Id_MCDC_121 != 0) [L296] EXPR Id_MCDC_94[0] [L296] EXPR ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) >= 0 && ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) <= 4294967295 [L296] EXPR Id_MCDC_94[0] [L296] EXPR ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) >= 0 && ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) <= 4294967295 [L296] CALL __VERIFIER_assert(( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) >= 0 && ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) <= 4294967295) [L459] COND TRUE ! (Id_MCDC_103) [L461] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 133 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 19.0s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 14.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1494 SDtfs, 2329 SDslu, 1424 SDs, 0 SdLazy, 3708 SolverSat, 490 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 10.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 152 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 232 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 551 NumberOfCodeBlocks, 551 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 541 ConstructedInterpolants, 0 QuantifiedInterpolants, 118782 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 105/141 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...