/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product41.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:40:42,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:40:42,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:40:42,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:40:42,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:40:42,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:40:42,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:40:42,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:40:42,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:40:42,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:40:42,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:40:42,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:40:42,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:40:42,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:40:42,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:40:42,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:40:42,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:40:42,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:40:42,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:40:42,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:40:42,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:40:42,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:40:42,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:40:42,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:40:42,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:40:42,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:40:42,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:40:42,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:40:42,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:40:42,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:40:42,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:40:42,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:40:42,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:40:42,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:40:42,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:40:42,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:40:42,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:40:42,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:40:42,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:40:42,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:40:42,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:40:42,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:40:42,823 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:40:42,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:40:42,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:40:42,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:40:42,826 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:40:42,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:40:42,826 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:40:42,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:40:42,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:40:42,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:40:42,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:40:42,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:40:42,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:40:42,829 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:40:42,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:40:42,830 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:40:42,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:40:42,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:40:42,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:40:42,830 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:40:42,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:40:42,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:40:42,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:40:42,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:40:42,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:40:42,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:40:42,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:40:42,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:40:42,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:40:42,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 21:40:43,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:40:43,164 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:40:43,169 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:40:43,171 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:40:43,172 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:40:43,172 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product41.cil.c [2020-08-18 21:40:43,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cbf146b3/0269801b0dbd465db5faf9379f7c2e2e/FLAG8be6d621c [2020-08-18 21:40:43,823 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:40:43,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product41.cil.c [2020-08-18 21:40:43,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cbf146b3/0269801b0dbd465db5faf9379f7c2e2e/FLAG8be6d621c [2020-08-18 21:40:44,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cbf146b3/0269801b0dbd465db5faf9379f7c2e2e [2020-08-18 21:40:44,151 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:40:44,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:40:44,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:40:44,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:40:44,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:40:44,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc2875a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44, skipping insertion in model container [2020-08-18 21:40:44,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:40:44,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:40:44,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:40:44,643 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:40:44,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:40:44,816 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:40:44,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44 WrapperNode [2020-08-18 21:40:44,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:40:44,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:40:44,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:40:44,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:40:44,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... [2020-08-18 21:40:44,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:40:44,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:40:44,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:40:44,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:40:44,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:40:45,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:40:45,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:40:45,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 21:40:45,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 21:40:45,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 21:40:45,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 21:40:45,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 21:40:45,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 21:40:45,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 21:40:45,004 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 21:40:45,005 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 21:40:45,005 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 21:40:45,005 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 21:40:45,006 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 21:40:45,006 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 21:40:45,007 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 21:40:45,007 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 21:40:45,007 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 21:40:45,007 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 21:40:45,007 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 21:40:45,007 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-08-18 21:40:45,008 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 21:40:45,008 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 21:40:45,008 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 21:40:45,008 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 21:40:45,009 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 21:40:45,009 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 21:40:45,009 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 21:40:45,010 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 21:40:45,010 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 21:40:45,010 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 21:40:45,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:40:45,010 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 21:40:45,010 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 21:40:45,010 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 21:40:45,011 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 21:40:45,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 21:40:45,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 21:40:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:40:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:40:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 21:40:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 21:40:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 21:40:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 21:40:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 21:40:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 21:40:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 21:40:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 21:40:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 21:40:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 21:40:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:40:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 21:40:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 21:40:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 21:40:45,014 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 21:40:45,014 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 21:40:45,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 21:40:45,015 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 21:40:45,015 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 21:40:45,015 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 21:40:45,015 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 21:40:45,015 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 21:40:45,015 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 21:40:45,015 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 21:40:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 21:40:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 21:40:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 21:40:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 21:40:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 21:40:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 21:40:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 21:40:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 21:40:45,018 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 21:40:45,018 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 21:40:45,018 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 21:40:45,019 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 21:40:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-08-18 21:40:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 21:40:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 21:40:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 21:40:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 21:40:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 21:40:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 21:40:45,021 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 21:40:45,021 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:40:45,021 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 21:40:45,021 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 21:40:45,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:40:45,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 21:40:45,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:40:46,104 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:40:46,105 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 21:40:46,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:40:46 BoogieIcfgContainer [2020-08-18 21:40:46,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:40:46,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:40:46,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:40:46,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:40:46,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:40:44" (1/3) ... [2020-08-18 21:40:46,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76fe1837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:40:46, skipping insertion in model container [2020-08-18 21:40:46,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:40:44" (2/3) ... [2020-08-18 21:40:46,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76fe1837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:40:46, skipping insertion in model container [2020-08-18 21:40:46,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:40:46" (3/3) ... [2020-08-18 21:40:46,123 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product41.cil.c [2020-08-18 21:40:46,134 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:40:46,143 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:40:46,158 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:40:46,189 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:40:46,189 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:40:46,190 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:40:46,190 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:40:46,190 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:40:46,190 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:40:46,190 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:40:46,190 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:40:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-08-18 21:40:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 21:40:46,220 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:40:46,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:40:46,222 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:40:46,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:40:46,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1904787813, now seen corresponding path program 1 times [2020-08-18 21:40:46,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:40:46,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368911675] [2020-08-18 21:40:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:40:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,924 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:40:46,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:40:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:40:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:40:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:40:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:40:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:40:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:46,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 21:40:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:40:47,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368911675] [2020-08-18 21:40:47,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:40:47,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:40:47,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007124711] [2020-08-18 21:40:47,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:40:47,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:40:47,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:40:47,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:40:47,039 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 3 states. [2020-08-18 21:40:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:40:48,119 INFO L93 Difference]: Finished difference Result 275 states and 361 transitions. [2020-08-18 21:40:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:40:48,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 21:40:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:40:48,137 INFO L225 Difference]: With dead ends: 275 [2020-08-18 21:40:48,137 INFO L226 Difference]: Without dead ends: 149 [2020-08-18 21:40:48,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:40:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-18 21:40:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2020-08-18 21:40:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-18 21:40:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2020-08-18 21:40:48,235 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 46 [2020-08-18 21:40:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:40:48,235 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2020-08-18 21:40:48,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:40:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2020-08-18 21:40:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 21:40:48,239 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:40:48,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:40:48,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:40:48,240 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:40:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:40:48,241 INFO L82 PathProgramCache]: Analyzing trace with hash -8679295, now seen corresponding path program 1 times [2020-08-18 21:40:48,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:40:48,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804922936] [2020-08-18 21:40:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:40:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,654 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:40:48,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:40:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:40:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:40:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:40:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:40:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 21:40:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:40:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:40:48,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804922936] [2020-08-18 21:40:48,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:40:48,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:40:48,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501221464] [2020-08-18 21:40:48,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:40:48,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:40:48,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:40:48,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:40:48,728 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand 4 states. [2020-08-18 21:40:49,135 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:40:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:40:49,797 INFO L93 Difference]: Finished difference Result 208 states and 252 transitions. [2020-08-18 21:40:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:40:49,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 21:40:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:40:49,801 INFO L225 Difference]: With dead ends: 208 [2020-08-18 21:40:49,801 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 21:40:49,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:40:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 21:40:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2020-08-18 21:40:49,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 21:40:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2020-08-18 21:40:49,837 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 47 [2020-08-18 21:40:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:40:49,838 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2020-08-18 21:40:49,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:40:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2020-08-18 21:40:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 21:40:49,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:40:49,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:40:49,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:40:49,840 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:40:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:40:49,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1364944070, now seen corresponding path program 1 times [2020-08-18 21:40:49,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:40:49,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297019170] [2020-08-18 21:40:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:40:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:50,201 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:40:50,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:40:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:50,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:40:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:50,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:40:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:50,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:40:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:50,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:40:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:50,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:40:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:50,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 21:40:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:40:50,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297019170] [2020-08-18 21:40:50,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:40:50,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 21:40:50,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801592559] [2020-08-18 21:40:50,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:40:50,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:40:50,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:40:50,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:40:50,275 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand 8 states. [2020-08-18 21:40:50,627 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:40:50,944 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:40:51,211 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:40:51,432 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:40:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:40:52,409 INFO L93 Difference]: Finished difference Result 217 states and 266 transitions. [2020-08-18 21:40:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:40:52,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 21:40:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:40:52,412 INFO L225 Difference]: With dead ends: 217 [2020-08-18 21:40:52,412 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 21:40:52,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:40:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 21:40:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2020-08-18 21:40:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 21:40:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-08-18 21:40:52,446 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 51 [2020-08-18 21:40:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:40:52,446 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-08-18 21:40:52,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:40:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-08-18 21:40:52,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 21:40:52,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:40:52,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:40:52,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:40:52,449 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:40:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:40:52,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1317252167, now seen corresponding path program 1 times [2020-08-18 21:40:52,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:40:52,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778600872] [2020-08-18 21:40:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:40:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:52,697 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:40:52,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:40:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:52,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:40:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:52,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:40:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:52,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:40:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:52,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:40:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:52,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 21:40:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:52,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:40:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:52,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 21:40:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:52,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 21:40:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:40:52,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778600872] [2020-08-18 21:40:52,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:40:52,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:40:52,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273463377] [2020-08-18 21:40:52,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:40:52,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:40:52,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:40:52,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:40:52,773 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 6 states. [2020-08-18 21:40:53,132 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:40:54,173 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:40:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:40:54,691 INFO L93 Difference]: Finished difference Result 300 states and 370 transitions. [2020-08-18 21:40:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:40:54,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-08-18 21:40:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:40:54,694 INFO L225 Difference]: With dead ends: 300 [2020-08-18 21:40:54,694 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 21:40:54,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:40:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 21:40:54,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2020-08-18 21:40:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-08-18 21:40:54,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2020-08-18 21:40:54,765 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 59 [2020-08-18 21:40:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:40:54,765 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2020-08-18 21:40:54,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:40:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2020-08-18 21:40:54,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 21:40:54,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:40:54,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:40:54,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:40:54,769 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:40:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:40:54,769 INFO L82 PathProgramCache]: Analyzing trace with hash 19293366, now seen corresponding path program 1 times [2020-08-18 21:40:54,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:40:54,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91838847] [2020-08-18 21:40:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:40:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:55,045 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:40:55,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:40:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:55,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:40:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:55,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:40:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:55,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:40:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:55,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:40:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:55,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 21:40:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:55,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:40:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:55,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:40:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:55,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:40:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:55,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 21:40:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:55,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 21:40:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:40:55,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91838847] [2020-08-18 21:40:55,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:40:55,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 21:40:55,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759245321] [2020-08-18 21:40:55,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:40:55,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:40:55,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:40:55,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:40:55,152 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand 8 states. [2020-08-18 21:40:55,476 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:40:56,348 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:40:56,644 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:40:57,154 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:40:57,375 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:40:57,637 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:40:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:40:58,349 INFO L93 Difference]: Finished difference Result 520 states and 648 transitions. [2020-08-18 21:40:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:40:58,353 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-08-18 21:40:58,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:40:58,356 INFO L225 Difference]: With dead ends: 520 [2020-08-18 21:40:58,356 INFO L226 Difference]: Without dead ends: 369 [2020-08-18 21:40:58,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:40:58,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-08-18 21:40:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 305. [2020-08-18 21:40:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-08-18 21:40:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 352 transitions. [2020-08-18 21:40:58,428 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 352 transitions. Word has length 73 [2020-08-18 21:40:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:40:58,429 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 352 transitions. [2020-08-18 21:40:58,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:40:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 352 transitions. [2020-08-18 21:40:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 21:40:58,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:40:58,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:40:58,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:40:58,432 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:40:58,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:40:58,433 INFO L82 PathProgramCache]: Analyzing trace with hash -989642822, now seen corresponding path program 1 times [2020-08-18 21:40:58,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:40:58,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031773662] [2020-08-18 21:40:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:40:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,699 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:40:58,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:40:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:40:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:40:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:40:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:40:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:40:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:40:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:40:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:40:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:40:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 21:40:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 21:40:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:40:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:40:58,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031773662] [2020-08-18 21:40:58,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:40:58,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 21:40:58,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118817067] [2020-08-18 21:40:58,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:40:58,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:40:58,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:40:58,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:40:58,792 INFO L87 Difference]: Start difference. First operand 305 states and 352 transitions. Second operand 9 states. [2020-08-18 21:40:59,128 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:00,159 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:00,398 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:01,056 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:01,300 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:01,568 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:01,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:01,711 INFO L93 Difference]: Finished difference Result 408 states and 516 transitions. [2020-08-18 21:41:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 21:41:01,711 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-08-18 21:41:01,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:01,716 INFO L225 Difference]: With dead ends: 408 [2020-08-18 21:41:01,716 INFO L226 Difference]: Without dead ends: 405 [2020-08-18 21:41:01,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 21:41:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-08-18 21:41:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 305. [2020-08-18 21:41:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-08-18 21:41:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 351 transitions. [2020-08-18 21:41:01,783 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 351 transitions. Word has length 77 [2020-08-18 21:41:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:01,783 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 351 transitions. [2020-08-18 21:41:01,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:41:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 351 transitions. [2020-08-18 21:41:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 21:41:01,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:01,786 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:41:01,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:41:01,786 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:01,787 INFO L82 PathProgramCache]: Analyzing trace with hash 636453553, now seen corresponding path program 1 times [2020-08-18 21:41:01,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:01,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228074783] [2020-08-18 21:41:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,037 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:02,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:41:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:41:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:41:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 21:41:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 21:41:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 21:41:02,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228074783] [2020-08-18 21:41:02,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:02,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 21:41:02,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368457975] [2020-08-18 21:41:02,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:41:02,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:02,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:41:02,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:41:02,177 INFO L87 Difference]: Start difference. First operand 305 states and 351 transitions. Second operand 9 states. [2020-08-18 21:41:02,979 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:03,250 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 21:41:03,491 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:03,733 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:04,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:04,560 INFO L93 Difference]: Finished difference Result 694 states and 873 transitions. [2020-08-18 21:41:04,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:41:04,561 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-08-18 21:41:04,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:04,564 INFO L225 Difference]: With dead ends: 694 [2020-08-18 21:41:04,564 INFO L226 Difference]: Without dead ends: 413 [2020-08-18 21:41:04,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:41:04,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-08-18 21:41:04,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 315. [2020-08-18 21:41:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-08-18 21:41:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 361 transitions. [2020-08-18 21:41:04,628 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 361 transitions. Word has length 93 [2020-08-18 21:41:04,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:04,629 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 361 transitions. [2020-08-18 21:41:04,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:41:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 361 transitions. [2020-08-18 21:41:04,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 21:41:04,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:04,631 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:41:04,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:41:04,632 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash -260939725, now seen corresponding path program 1 times [2020-08-18 21:41:04,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:04,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134653307] [2020-08-18 21:41:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:04,904 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:04,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:04,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:04,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:04,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:04,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:04,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:41:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:04,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:41:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:04,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:04,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:05,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:41:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:05,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:05,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:05,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:05,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 21:41:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:05,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 21:41:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 21:41:05,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134653307] [2020-08-18 21:41:05,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:05,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 21:41:05,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343152825] [2020-08-18 21:41:05,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 21:41:05,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:05,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 21:41:05,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:41:05,044 INFO L87 Difference]: Start difference. First operand 315 states and 361 transitions. Second operand 11 states. [2020-08-18 21:41:05,966 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:06,210 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:06,460 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:07,032 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:07,292 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:07,532 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:08,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:08,515 INFO L93 Difference]: Finished difference Result 714 states and 895 transitions. [2020-08-18 21:41:08,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:41:08,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-08-18 21:41:08,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:08,520 INFO L225 Difference]: With dead ends: 714 [2020-08-18 21:41:08,520 INFO L226 Difference]: Without dead ends: 423 [2020-08-18 21:41:08,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 21:41:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-08-18 21:41:08,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 323. [2020-08-18 21:41:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-18 21:41:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 369 transitions. [2020-08-18 21:41:08,589 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 369 transitions. Word has length 93 [2020-08-18 21:41:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:08,589 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 369 transitions. [2020-08-18 21:41:08,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 21:41:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 369 transitions. [2020-08-18 21:41:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 21:41:08,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:08,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:41:08,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:41:08,593 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:08,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:08,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1709999732, now seen corresponding path program 1 times [2020-08-18 21:41:08,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:08,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857456337] [2020-08-18 21:41:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,846 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:08,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:41:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:41:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:41:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 21:41:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:08,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 21:41:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 21:41:09,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857456337] [2020-08-18 21:41:09,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:09,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 21:41:09,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680277525] [2020-08-18 21:41:09,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:41:09,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:09,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:41:09,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:41:09,005 INFO L87 Difference]: Start difference. First operand 323 states and 369 transitions. Second operand 7 states. [2020-08-18 21:41:09,338 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:09,799 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:11,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:11,494 INFO L93 Difference]: Finished difference Result 997 states and 1285 transitions. [2020-08-18 21:41:11,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 21:41:11,495 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-18 21:41:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:11,502 INFO L225 Difference]: With dead ends: 997 [2020-08-18 21:41:11,502 INFO L226 Difference]: Without dead ends: 698 [2020-08-18 21:41:11,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:41:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-18 21:41:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 599. [2020-08-18 21:41:11,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-08-18 21:41:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 711 transitions. [2020-08-18 21:41:11,635 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 711 transitions. Word has length 93 [2020-08-18 21:41:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:11,636 INFO L479 AbstractCegarLoop]: Abstraction has 599 states and 711 transitions. [2020-08-18 21:41:11,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:41:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 711 transitions. [2020-08-18 21:41:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 21:41:11,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:11,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:41:11,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:41:11,643 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:11,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:11,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1136093798, now seen corresponding path program 1 times [2020-08-18 21:41:11,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:11,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803635358] [2020-08-18 21:41:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:11,972 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:11,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:11,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:11,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:11,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:12,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:12,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 21:41:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:12,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 21:41:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:12,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 21:41:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:12,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:12,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:12,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:41:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:12,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:12,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:12,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:12,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 21:41:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:12,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 21:41:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 21:41:12,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803635358] [2020-08-18 21:41:12,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:41:12,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 21:41:12,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121838028] [2020-08-18 21:41:12,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 21:41:12,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:12,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 21:41:12,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 21:41:12,315 INFO L87 Difference]: Start difference. First operand 599 states and 711 transitions. Second operand 17 states. [2020-08-18 21:41:13,119 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:13,428 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:41:13,692 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:41:13,942 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:41:14,518 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:15,407 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:41:15,713 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:41:15,981 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:41:16,258 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:41:16,624 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:41:16,916 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 21:41:17,525 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 188 [2020-08-18 21:41:18,100 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 188 [2020-08-18 21:41:19,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:19,543 INFO L93 Difference]: Finished difference Result 1238 states and 1532 transitions. [2020-08-18 21:41:19,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 21:41:19,544 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-08-18 21:41:19,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:19,548 INFO L225 Difference]: With dead ends: 1238 [2020-08-18 21:41:19,548 INFO L226 Difference]: Without dead ends: 663 [2020-08-18 21:41:19,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 21:41:19,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-08-18 21:41:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 567. [2020-08-18 21:41:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-08-18 21:41:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 660 transitions. [2020-08-18 21:41:19,654 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 660 transitions. Word has length 97 [2020-08-18 21:41:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:19,655 INFO L479 AbstractCegarLoop]: Abstraction has 567 states and 660 transitions. [2020-08-18 21:41:19,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 21:41:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 660 transitions. [2020-08-18 21:41:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-18 21:41:19,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:19,658 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:41:19,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:41:19,658 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:19,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:19,658 INFO L82 PathProgramCache]: Analyzing trace with hash 773081915, now seen corresponding path program 1 times [2020-08-18 21:41:19,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:19,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730136351] [2020-08-18 21:41:19,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:41:19,721 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:41:19,721 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:41:19,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:41:19,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:41:19 BoogieIcfgContainer [2020-08-18 21:41:19,754 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:41:19,756 INFO L168 Benchmark]: Toolchain (without parser) took 35603.23 ms. Allocated memory was 141.0 MB in the beginning and 647.5 MB in the end (delta: 506.5 MB). Free memory was 102.8 MB in the beginning and 279.2 MB in the end (delta: -176.4 MB). Peak memory consumption was 330.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:19,757 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 21:41:19,758 INFO L168 Benchmark]: CACSL2BoogieTranslator took 660.38 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 102.6 MB in the beginning and 170.8 MB in the end (delta: -68.2 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:19,758 INFO L168 Benchmark]: Boogie Preprocessor took 88.99 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 166.3 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:19,759 INFO L168 Benchmark]: RCFGBuilder took 1207.33 ms. Allocated memory was 203.9 MB in the beginning and 234.9 MB in the end (delta: 30.9 MB). Free memory was 166.3 MB in the beginning and 191.9 MB in the end (delta: -25.7 MB). Peak memory consumption was 79.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:19,760 INFO L168 Benchmark]: TraceAbstraction took 33638.80 ms. Allocated memory was 234.9 MB in the beginning and 647.5 MB in the end (delta: 412.6 MB). Free memory was 191.9 MB in the beginning and 279.2 MB in the end (delta: -87.3 MB). Peak memory consumption was 325.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:19,763 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 660.38 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 102.6 MB in the beginning and 170.8 MB in the end (delta: -68.2 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 88.99 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 166.3 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1207.33 ms. Allocated memory was 203.9 MB in the beginning and 234.9 MB in the end (delta: 30.9 MB). Free memory was 166.3 MB in the beginning and 191.9 MB in the end (delta: -25.7 MB). Peak memory consumption was 79.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 33638.80 ms. Allocated memory was 234.9 MB in the beginning and 647.5 MB in the end (delta: 412.6 MB). Free memory was 191.9 MB in the beginning and 279.2 MB in the end (delta: -87.3 MB). Peak memory consumption was 325.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 887]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L209] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L480] int waterLevel = 1; [L481] int methaneLevelCritical = 0; [L578] int pumpRunning = 0; [L579] int systemActive = 1; [L749] int cleanupTimeShifts = 4; [L825] int retValue_acc ; [L826] int tmp ; [L830] FCALL select_helpers() [L831] FCALL select_features() [L832] CALL, EXPR valid_product() [L874] int retValue_acc ; [L877] retValue_acc = 1 [L878] return (retValue_acc); [L832] RET, EXPR valid_product() [L832] tmp = valid_product() [L834] COND TRUE \read(tmp) [L836] FCALL setup() [L837] CALL runTest() [L816] CALL test() [L411] int splverifierCounter ; [L412] int tmp ; [L413] int tmp___0 ; [L414] int tmp___1 ; [L415] int tmp___2 ; [L418] splverifierCounter = 0 [L420] COND TRUE 1 [L422] COND TRUE splverifierCounter < 4 [L428] tmp = __VERIFIER_nondet_int() [L430] COND TRUE \read(tmp) [L432] CALL waterRise() [L498] COND TRUE waterLevel < 2 [L499] waterLevel = waterLevel + 1 [L432] RET waterRise() [L438] tmp___0 = __VERIFIER_nondet_int() [L440] COND FALSE !(\read(tmp___0)) [L448] tmp___2 = __VERIFIER_nondet_int() [L450] COND TRUE \read(tmp___2) [L463] CALL timeShift() [L586] COND FALSE !(\read(pumpRunning)) [L593] COND TRUE \read(systemActive) [L595] CALL processEnvironment() [L615] int tmp ; [L618] COND TRUE ! pumpRunning [L620] CALL, EXPR isHighWaterLevel() [L730] int retValue_acc ; [L731] int tmp ; [L732] int tmp___0 ; [L736] CALL, EXPR isHighWaterSensorDry() [L560] int retValue_acc ; [L563] COND FALSE !(waterLevel < 2) [L567] retValue_acc = 0 [L568] return (retValue_acc); [L736] RET, EXPR isHighWaterSensorDry() [L736] tmp = isHighWaterSensorDry() [L738] COND FALSE !(\read(tmp)) [L741] tmp___0 = 1 [L743] retValue_acc = tmp___0 [L744] return (retValue_acc); [L620] RET, EXPR isHighWaterLevel() [L620] tmp = isHighWaterLevel() [L622] COND TRUE \read(tmp) [L624] CALL activatePump() [L649] int tmp ; [L653] CALL, EXPR isMethaneAlarm() [L674] int retValue_acc ; [L678] CALL, EXPR isMethaneLevelCritical() [L519] int retValue_acc ; [L522] retValue_acc = methaneLevelCritical [L523] return (retValue_acc); [L678] RET, EXPR isMethaneLevelCritical() [L678] retValue_acc = isMethaneLevelCritical() [L680] return (retValue_acc); [L653] RET, EXPR isMethaneAlarm() [L653] tmp = isMethaneAlarm() [L655] COND FALSE !(\read(tmp)) [L659] CALL activatePump__wrappee__highWaterSensor() [L643] pumpRunning = 1 [L659] RET activatePump__wrappee__highWaterSensor() [L624] RET activatePump() [L595] RET processEnvironment() [L601] CALL __utac_acc__Specification1_spec__1() [L893] int tmp ; [L894] int tmp___0 ; [L898] CALL, EXPR isMethaneLevelCritical() [L519] int retValue_acc ; [L522] retValue_acc = methaneLevelCritical [L523] return (retValue_acc); [L898] RET, EXPR isMethaneLevelCritical() [L898] tmp = isMethaneLevelCritical() [L900] COND FALSE !(\read(tmp)) [L601] RET __utac_acc__Specification1_spec__1() [L463] RET timeShift() [L420] COND TRUE 1 [L422] COND TRUE splverifierCounter < 4 [L428] tmp = __VERIFIER_nondet_int() [L430] COND FALSE !(\read(tmp)) [L438] tmp___0 = __VERIFIER_nondet_int() [L440] COND TRUE \read(tmp___0) [L442] CALL changeMethaneLevel() [L510] COND FALSE !(\read(methaneLevelCritical)) [L513] methaneLevelCritical = 1 [L442] RET changeMethaneLevel() [L448] tmp___2 = __VERIFIER_nondet_int() [L450] COND TRUE \read(tmp___2) [L463] CALL timeShift() [L586] COND TRUE \read(pumpRunning) [L588] CALL lowerWaterLevel() [L486] COND TRUE waterLevel > 0 [L487] waterLevel = waterLevel - 1 [L588] RET lowerWaterLevel() [L593] COND TRUE \read(systemActive) [L595] CALL processEnvironment() [L615] int tmp ; [L618] COND FALSE !(! pumpRunning) [L633] FCALL processEnvironment__wrappee__base() [L595] RET processEnvironment() [L601] CALL __utac_acc__Specification1_spec__1() [L893] int tmp ; [L894] int tmp___0 ; [L898] CALL, EXPR isMethaneLevelCritical() [L519] int retValue_acc ; [L522] retValue_acc = methaneLevelCritical [L523] return (retValue_acc); [L898] RET, EXPR isMethaneLevelCritical() [L898] tmp = isMethaneLevelCritical() [L900] COND TRUE \read(tmp) [L902] CALL, EXPR isPumpRunning() [L685] int retValue_acc ; [L688] retValue_acc = pumpRunning [L689] return (retValue_acc); [L902] RET, EXPR isPumpRunning() [L902] tmp___0 = isPumpRunning() [L904] COND TRUE \read(tmp___0) [L906] CALL __automaton_fail() [L887] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 38 procedures, 222 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 33.5s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 27.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1134 SDtfs, 2290 SDslu, 1330 SDs, 0 SdLazy, 6355 SolverSat, 1427 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 391 GetRequests, 259 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 13.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=599occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 10 MinimizatonAttempts, 680 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 719 ConstructedInterpolants, 0 QuantifiedInterpolants, 229226 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 9 PerfectInterpolantSequences, 10/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...