/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec2_product44.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:20:20,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:20:20,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:20:20,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:20:20,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:20:20,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:20:20,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:20:20,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:20:20,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:20:20,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:20:20,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:20:20,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:20:20,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:20:20,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:20:20,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:20:20,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:20:20,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:20:20,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:20:20,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:20:20,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:20:20,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:20:20,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:20:20,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:20:20,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:20:20,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:20:20,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:20:20,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:20:20,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:20:20,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:20:20,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:20:20,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:20:20,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:20:20,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:20:20,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:20:20,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:20:20,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:20:20,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:20:20,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:20:20,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:20:20,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:20:20,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:20:20,852 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 [2020-08-21 16:20:20,880 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:20:20,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:20:20,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:20:20,882 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:20:20,882 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:20:20,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:20:20,882 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:20:20,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:20:20,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:20:20,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:20:20,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:20:20,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:20:20,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:20:20,884 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:20:20,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:20:20,884 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:20:20,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:20:20,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:20:20,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:20:20,885 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:20:20,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:20:20,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:20:20,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:20:20,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:20:20,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:20:20,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:20:20,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:20:20,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:20:20,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:20:20,887 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:20:21,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:20:21,205 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:20:21,209 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:20:21,210 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:20:21,211 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:20:21,212 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product44.cil.c [2020-08-21 16:20:21,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/faceb6c5c/450a255555484387b1d5af1a84c0adc4/FLAG838c4f75d [2020-08-21 16:20:21,842 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:20:21,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec2_product44.cil.c [2020-08-21 16:20:21,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/faceb6c5c/450a255555484387b1d5af1a84c0adc4/FLAG838c4f75d [2020-08-21 16:20:22,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/faceb6c5c/450a255555484387b1d5af1a84c0adc4 [2020-08-21 16:20:22,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:20:22,168 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:20:22,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:20:22,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:20:22,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:20:22,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:20:22" (1/1) ... [2020-08-21 16:20:22,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@184fc857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:20:22, skipping insertion in model container [2020-08-21 16:20:22,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:20:22" (1/1) ... [2020-08-21 16:20:22,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:20:22,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:20:22,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:20:22,675 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:20:22,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:20:22,814 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:20:22,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:20:22 WrapperNode [2020-08-21 16:20:22,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:20:22,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:20:22,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:20:22,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:20:22,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:20:22" (1/1) ... [2020-08-21 16:20:22,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:20:22" (1/1) ... [2020-08-21 16:20:22,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:20:22" (1/1) ... [2020-08-21 16:20:22,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:20:22" (1/1) ... [2020-08-21 16:20:22,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:20:22" (1/1) ... [2020-08-21 16:20:22,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:20:22" (1/1) ... [2020-08-21 16:20:22,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:20:22" (1/1) ... [2020-08-21 16:20:22,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:20:22,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:20:22,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:20:22,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:20:22,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:20:22" (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 [2020-08-21 16:20:22,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:20:22,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:20:22,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 16:20:22,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 16:20:22,979 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 16:20:22,979 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 16:20:22,979 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 16:20:22,979 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 16:20:22,979 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-08-21 16:20:22,979 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 16:20:22,980 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 16:20:22,980 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 16:20:22,980 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 16:20:22,980 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 16:20:22,980 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 16:20:22,980 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 16:20:22,981 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 16:20:22,981 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 16:20:22,981 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 16:20:22,981 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 16:20:22,981 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 16:20:22,981 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 16:20:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 16:20:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 16:20:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 16:20:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:20:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2020-08-21 16:20:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2020-08-21 16:20:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 16:20:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 16:20:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 16:20:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 16:20:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 16:20:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 16:20:22,984 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 16:20:22,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 16:20:22,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 16:20:22,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 16:20:22,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 16:20:22,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 16:20:22,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 16:20:22,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:20:22,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:20:22,985 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 16:20:22,985 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 16:20:22,985 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 16:20:22,986 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 16:20:22,986 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 16:20:22,986 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 16:20:22,986 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 16:20:22,986 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 16:20:22,986 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 16:20:22,986 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 16:20:22,987 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 16:20:22,987 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 16:20:22,987 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 16:20:22,987 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 16:20:22,988 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 16:20:22,988 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 16:20:22,988 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 16:20:22,988 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2020-08-21 16:20:22,988 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 16:20:22,988 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 16:20:22,989 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 16:20:22,989 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-08-21 16:20:22,989 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 16:20:22,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 16:20:22,989 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 16:20:22,989 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 16:20:22,989 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 16:20:22,990 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 16:20:22,990 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 16:20:22,991 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 16:20:22,992 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2020-08-21 16:20:22,992 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 16:20:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:20:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 16:20:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 16:20:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 16:20:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 16:20:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 16:20:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 16:20:22,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 16:20:22,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 16:20:22,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 16:20:22,994 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 16:20:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 16:20:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 16:20:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 16:20:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 16:20:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 16:20:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 16:20:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 16:20:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:20:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 16:20:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:20:24,050 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:20:24,051 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 16:20:24,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:20:24 BoogieIcfgContainer [2020-08-21 16:20:24,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:20:24,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:20:24,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:20:24,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:20:24,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:20:22" (1/3) ... [2020-08-21 16:20:24,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494d32ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:20:24, skipping insertion in model container [2020-08-21 16:20:24,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:20:22" (2/3) ... [2020-08-21 16:20:24,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494d32ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:20:24, skipping insertion in model container [2020-08-21 16:20:24,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:20:24" (3/3) ... [2020-08-21 16:20:24,065 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product44.cil.c [2020-08-21 16:20:24,077 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:20:24,085 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:20:24,101 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:20:24,127 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:20:24,127 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:20:24,127 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:20:24,127 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:20:24,128 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:20:24,128 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:20:24,128 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:20:24,128 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:20:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states. [2020-08-21 16:20:24,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 16:20:24,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:20:24,164 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] [2020-08-21 16:20:24,164 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:20:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:20:24,171 INFO L82 PathProgramCache]: Analyzing trace with hash 925001116, now seen corresponding path program 1 times [2020-08-21 16:20:24,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:20:24,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718572669] [2020-08-21 16:20:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:20:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:24,845 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:20:24,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:20:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:24,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:20:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:24,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:20:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:24,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:20:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:24,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:20:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:24,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:20:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:24,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 16:20:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:24,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 16:20:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:20:24,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718572669] [2020-08-21 16:20:24,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:20:24,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:20:24,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525568141] [2020-08-21 16:20:24,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:20:24,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:20:25,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:20:25,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:20:25,007 INFO L87 Difference]: Start difference. First operand 178 states. Second operand 4 states. [2020-08-21 16:20:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:20:26,157 INFO L93 Difference]: Finished difference Result 305 states and 395 transitions. [2020-08-21 16:20:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:20:26,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-21 16:20:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:20:26,173 INFO L225 Difference]: With dead ends: 305 [2020-08-21 16:20:26,174 INFO L226 Difference]: Without dead ends: 171 [2020-08-21 16:20:26,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:20:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-08-21 16:20:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 135. [2020-08-21 16:20:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-08-21 16:20:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2020-08-21 16:20:26,289 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 51 [2020-08-21 16:20:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:20:26,289 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2020-08-21 16:20:26,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:20:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2020-08-21 16:20:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 16:20:26,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:20:26,293 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] [2020-08-21 16:20:26,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:20:26,294 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:20:26,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:20:26,294 INFO L82 PathProgramCache]: Analyzing trace with hash -214077655, now seen corresponding path program 1 times [2020-08-21 16:20:26,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:20:26,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048315867] [2020-08-21 16:20:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:20:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:26,617 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:20:26,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:20:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:26,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:20:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:26,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:20:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:26,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:20:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:26,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:20:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:26,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:20:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:26,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 16:20:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:26,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 16:20:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:20:26,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048315867] [2020-08-21 16:20:26,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:20:26,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:20:26,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701903450] [2020-08-21 16:20:26,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:20:26,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:20:26,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:20:26,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:20:26,715 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand 5 states. [2020-08-21 16:20:27,164 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:20:28,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:20:28,123 INFO L93 Difference]: Finished difference Result 237 states and 292 transitions. [2020-08-21 16:20:28,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:20:28,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-08-21 16:20:28,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:20:28,127 INFO L225 Difference]: With dead ends: 237 [2020-08-21 16:20:28,128 INFO L226 Difference]: Without dead ends: 161 [2020-08-21 16:20:28,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:20:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-08-21 16:20:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 126. [2020-08-21 16:20:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-21 16:20:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2020-08-21 16:20:28,169 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 52 [2020-08-21 16:20:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:20:28,170 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2020-08-21 16:20:28,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:20:28,170 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2020-08-21 16:20:28,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 16:20:28,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:20:28,172 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] [2020-08-21 16:20:28,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:20:28,173 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:20:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:20:28,173 INFO L82 PathProgramCache]: Analyzing trace with hash 784654360, now seen corresponding path program 1 times [2020-08-21 16:20:28,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:20:28,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670667417] [2020-08-21 16:20:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:20:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:28,568 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:20:28,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:20:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:28,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:20:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:28,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:20:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:28,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:20:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:28,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:20:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:28,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:20:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:28,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 16:20:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:28,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 16:20:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:20:28,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670667417] [2020-08-21 16:20:28,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:20:28,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 16:20:28,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498902994] [2020-08-21 16:20:28,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:20:28,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:20:28,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:20:28,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:20:28,663 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand 9 states. [2020-08-21 16:20:29,065 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:20:29,365 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:20:29,625 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:20:29,887 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:20:30,665 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:20:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:20:32,484 INFO L93 Difference]: Finished difference Result 430 states and 536 transitions. [2020-08-21 16:20:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 16:20:32,487 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-08-21 16:20:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:20:32,492 INFO L225 Difference]: With dead ends: 430 [2020-08-21 16:20:32,492 INFO L226 Difference]: Without dead ends: 332 [2020-08-21 16:20:32,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-08-21 16:20:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-08-21 16:20:32,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 251. [2020-08-21 16:20:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-08-21 16:20:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 300 transitions. [2020-08-21 16:20:32,562 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 300 transitions. Word has length 57 [2020-08-21 16:20:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:20:32,563 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 300 transitions. [2020-08-21 16:20:32,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:20:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 300 transitions. [2020-08-21 16:20:32,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 16:20:32,565 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:20:32,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:20:32,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:20:32,566 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:20:32,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:20:32,566 INFO L82 PathProgramCache]: Analyzing trace with hash 402514829, now seen corresponding path program 1 times [2020-08-21 16:20:32,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:20:32,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524991369] [2020-08-21 16:20:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:20:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:32,922 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:20:32,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:20:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:32,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:20:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:32,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:20:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:32,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:20:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:32,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:20:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:32,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:20:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:32,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 16:20:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:32,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 16:20:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:33,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 16:20:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:20:33,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524991369] [2020-08-21 16:20:33,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:20:33,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 16:20:33,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843428046] [2020-08-21 16:20:33,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:20:33,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:20:33,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:20:33,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:20:33,027 INFO L87 Difference]: Start difference. First operand 251 states and 300 transitions. Second operand 9 states. [2020-08-21 16:20:33,397 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:20:34,570 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:20:34,887 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:20:35,146 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:20:35,421 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:20:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:20:36,668 INFO L93 Difference]: Finished difference Result 810 states and 1064 transitions. [2020-08-21 16:20:36,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 16:20:36,668 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-08-21 16:20:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:20:36,675 INFO L225 Difference]: With dead ends: 810 [2020-08-21 16:20:36,675 INFO L226 Difference]: Without dead ends: 587 [2020-08-21 16:20:36,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-21 16:20:36,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-21 16:20:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 450. [2020-08-21 16:20:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-08-21 16:20:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 540 transitions. [2020-08-21 16:20:36,794 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 540 transitions. Word has length 62 [2020-08-21 16:20:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:20:36,794 INFO L479 AbstractCegarLoop]: Abstraction has 450 states and 540 transitions. [2020-08-21 16:20:36,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:20:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 540 transitions. [2020-08-21 16:20:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 16:20:36,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:20:36,797 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] [2020-08-21 16:20:36,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:20:36,798 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:20:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:20:36,798 INFO L82 PathProgramCache]: Analyzing trace with hash 571350953, now seen corresponding path program 1 times [2020-08-21 16:20:36,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:20:36,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795650319] [2020-08-21 16:20:36,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:20:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:37,145 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:20:37,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:20:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:37,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:20:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:37,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:20:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:37,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:20:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:37,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:20:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:37,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:20:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:37,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 16:20:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:37,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 16:20:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:37,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 16:20:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:37,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 16:20:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:20:37,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795650319] [2020-08-21 16:20:37,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:20:37,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 16:20:37,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417298823] [2020-08-21 16:20:37,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:20:37,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:20:37,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:20:37,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:20:37,295 INFO L87 Difference]: Start difference. First operand 450 states and 540 transitions. Second operand 10 states. [2020-08-21 16:20:37,748 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:20:38,815 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:20:39,153 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:20:39,413 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:20:40,048 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:20:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:20:41,104 INFO L93 Difference]: Finished difference Result 1266 states and 1696 transitions. [2020-08-21 16:20:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 16:20:41,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-08-21 16:20:41,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:20:41,112 INFO L225 Difference]: With dead ends: 1266 [2020-08-21 16:20:41,113 INFO L226 Difference]: Without dead ends: 844 [2020-08-21 16:20:41,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2020-08-21 16:20:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-08-21 16:20:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 649. [2020-08-21 16:20:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-08-21 16:20:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 779 transitions. [2020-08-21 16:20:41,250 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 779 transitions. Word has length 66 [2020-08-21 16:20:41,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:20:41,250 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 779 transitions. [2020-08-21 16:20:41,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:20:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 779 transitions. [2020-08-21 16:20:41,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 16:20:41,253 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:20:41,254 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, 1, 1] [2020-08-21 16:20:41,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:20:41,254 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:20:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:20:41,255 INFO L82 PathProgramCache]: Analyzing trace with hash 206198489, now seen corresponding path program 1 times [2020-08-21 16:20:41,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:20:41,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056049343] [2020-08-21 16:20:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:20:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,513 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:20:41,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:20:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:20:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:20:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:20:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:20:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:20:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 16:20:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:20:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:20:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:20:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:20:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:20:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:20:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:20:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-21 16:20:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 16:20:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 16:20:41,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056049343] [2020-08-21 16:20:41,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:20:41,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 16:20:41,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542791479] [2020-08-21 16:20:41,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:20:41,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:20:41,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:20:41,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:20:41,723 INFO L87 Difference]: Start difference. First operand 649 states and 779 transitions. Second operand 8 states. [2020-08-21 16:20:42,090 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:20:42,683 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:20:46,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:20:46,078 INFO L93 Difference]: Finished difference Result 2906 states and 4118 transitions. [2020-08-21 16:20:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 16:20:46,079 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-08-21 16:20:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:20:46,096 INFO L225 Difference]: With dead ends: 2906 [2020-08-21 16:20:46,096 INFO L226 Difference]: Without dead ends: 2285 [2020-08-21 16:20:46,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2020-08-21 16:20:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-08-21 16:20:46,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1791. [2020-08-21 16:20:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1791 states. [2020-08-21 16:20:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2205 transitions. [2020-08-21 16:20:46,521 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2205 transitions. Word has length 99 [2020-08-21 16:20:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:20:46,522 INFO L479 AbstractCegarLoop]: Abstraction has 1791 states and 2205 transitions. [2020-08-21 16:20:46,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:20:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2205 transitions. [2020-08-21 16:20:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 16:20:46,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:20:46,526 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, 1, 1] [2020-08-21 16:20:46,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:20:46,527 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:20:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:20:46,527 INFO L82 PathProgramCache]: Analyzing trace with hash -763382534, now seen corresponding path program 1 times [2020-08-21 16:20:46,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:20:46,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612810555] [2020-08-21 16:20:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:20:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,778 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:20:46,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:20:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:20:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:20:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:20:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:20:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:20:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 16:20:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:20:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:20:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:20:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:20:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:20:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:20:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:20:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-21 16:20:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 16:20:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 16:20:46,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612810555] [2020-08-21 16:20:46,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:20:46,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 16:20:46,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894944584] [2020-08-21 16:20:46,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:20:46,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:20:46,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:20:46,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:20:46,976 INFO L87 Difference]: Start difference. First operand 1791 states and 2205 transitions. Second operand 12 states. [2020-08-21 16:20:47,483 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:20:47,719 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:20:47,942 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:20:48,737 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:20:49,006 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:20:49,251 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:20:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:20:50,817 INFO L93 Difference]: Finished difference Result 4034 states and 5429 transitions. [2020-08-21 16:20:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:20:50,818 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 99 [2020-08-21 16:20:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:20:50,834 INFO L225 Difference]: With dead ends: 4034 [2020-08-21 16:20:50,834 INFO L226 Difference]: Without dead ends: 2271 [2020-08-21 16:20:50,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-08-21 16:20:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2020-08-21 16:20:51,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1791. [2020-08-21 16:20:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1791 states. [2020-08-21 16:20:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2197 transitions. [2020-08-21 16:20:51,178 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2197 transitions. Word has length 99 [2020-08-21 16:20:51,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:20:51,181 INFO L479 AbstractCegarLoop]: Abstraction has 1791 states and 2197 transitions. [2020-08-21 16:20:51,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 16:20:51,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2197 transitions. [2020-08-21 16:20:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 16:20:51,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:20:51,185 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, 1, 1] [2020-08-21 16:20:51,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:20:51,185 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:20:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:20:51,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1286005308, now seen corresponding path program 1 times [2020-08-21 16:20:51,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:20:51,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609549628] [2020-08-21 16:20:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:20:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,477 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:20:51,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:20:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:20:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:20:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:20:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:20:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:20:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 16:20:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 16:20:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:20:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:20:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:20:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:20:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:20:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:20:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-21 16:20:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 16:20:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 16:20:51,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609549628] [2020-08-21 16:20:51,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:20:51,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 16:20:51,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742740218] [2020-08-21 16:20:51,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:20:51,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:20:51,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:20:51,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:20:51,626 INFO L87 Difference]: Start difference. First operand 1791 states and 2197 transitions. Second operand 10 states. [2020-08-21 16:20:52,692 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:20:52,980 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-21 16:20:53,231 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:20:53,460 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 16:20:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:20:54,671 INFO L93 Difference]: Finished difference Result 3586 states and 4823 transitions. [2020-08-21 16:20:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 16:20:54,671 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-21 16:20:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:20:54,684 INFO L225 Difference]: With dead ends: 3586 [2020-08-21 16:20:54,684 INFO L226 Difference]: Without dead ends: 1823 [2020-08-21 16:20:54,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-08-21 16:20:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2020-08-21 16:20:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1475. [2020-08-21 16:20:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1475 states. [2020-08-21 16:20:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 1779 transitions. [2020-08-21 16:20:55,146 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 1779 transitions. Word has length 99 [2020-08-21 16:20:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:20:55,146 INFO L479 AbstractCegarLoop]: Abstraction has 1475 states and 1779 transitions. [2020-08-21 16:20:55,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:20:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 1779 transitions. [2020-08-21 16:20:55,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 16:20:55,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:20:55,152 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, 1, 1, 1, 1, 1, 1] [2020-08-21 16:20:55,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:20:55,152 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:20:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:20:55,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1816296961, now seen corresponding path program 1 times [2020-08-21 16:20:55,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:20:55,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039636385] [2020-08-21 16:20:55,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:20:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,430 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:20:55,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:20:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:20:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:20:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:20:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:20:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:20:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 16:20:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 16:20:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 16:20:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:20:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:20:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:20:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:20:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:20:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:20:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-21 16:20:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 16:20:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:20:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:20:55,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039636385] [2020-08-21 16:20:55,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:20:55,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 16:20:55,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929075425] [2020-08-21 16:20:55,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 16:20:55,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:20:55,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 16:20:55,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-08-21 16:20:55,710 INFO L87 Difference]: Start difference. First operand 1475 states and 1779 transitions. Second operand 18 states. [2020-08-21 16:20:56,383 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:20:56,758 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-21 16:20:57,015 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:20:57,251 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-08-21 16:20:57,926 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:20:58,577 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:20:58,983 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:00,073 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:00,396 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:00,798 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:01,067 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 16:21:01,726 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 191 [2020-08-21 16:21:02,248 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 191 [2020-08-21 16:21:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:21:03,597 INFO L93 Difference]: Finished difference Result 3226 states and 4133 transitions. [2020-08-21 16:21:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-21 16:21:03,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 103 [2020-08-21 16:21:03,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:21:03,612 INFO L225 Difference]: With dead ends: 3226 [2020-08-21 16:21:03,612 INFO L226 Difference]: Without dead ends: 1779 [2020-08-21 16:21:03,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2020-08-21 16:21:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2020-08-21 16:21:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1459. [2020-08-21 16:21:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1459 states. [2020-08-21 16:21:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 1747 transitions. [2020-08-21 16:21:03,974 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 1747 transitions. Word has length 103 [2020-08-21 16:21:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:21:03,975 INFO L479 AbstractCegarLoop]: Abstraction has 1459 states and 1747 transitions. [2020-08-21 16:21:03,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 16:21:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 1747 transitions. [2020-08-21 16:21:03,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-21 16:21:03,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:03,980 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:21:03,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:21:03,981 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:03,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1518550128, now seen corresponding path program 1 times [2020-08-21 16:21:03,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:03,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3892736] [2020-08-21 16:21:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,275 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:21:04,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:21:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:21:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:21:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:21:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 16:21:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 16:21:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:21:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 16:21:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 16:21:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-21 16:21:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 16:21:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 16:21:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-21 16:21:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-21 16:21:04,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3892736] [2020-08-21 16:21:04,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:21:04,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:21:04,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356055910] [2020-08-21 16:21:04,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:21:04,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:21:04,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:21:04,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:21:04,498 INFO L87 Difference]: Start difference. First operand 1459 states and 1747 transitions. Second operand 9 states. [2020-08-21 16:21:05,040 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:07,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:21:07,655 INFO L93 Difference]: Finished difference Result 2826 states and 3752 transitions. [2020-08-21 16:21:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 16:21:07,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 139 [2020-08-21 16:21:07,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:21:07,672 INFO L225 Difference]: With dead ends: 2826 [2020-08-21 16:21:07,672 INFO L226 Difference]: Without dead ends: 2823 [2020-08-21 16:21:07,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2020-08-21 16:21:07,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2020-08-21 16:21:08,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2262. [2020-08-21 16:21:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2262 states. [2020-08-21 16:21:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 2722 transitions. [2020-08-21 16:21:08,190 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 2722 transitions. Word has length 139 [2020-08-21 16:21:08,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:21:08,191 INFO L479 AbstractCegarLoop]: Abstraction has 2262 states and 2722 transitions. [2020-08-21 16:21:08,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:21:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 2722 transitions. [2020-08-21 16:21:08,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-08-21 16:21:08,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:08,201 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-21 16:21:08,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:21:08,201 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:08,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1850969506, now seen corresponding path program 1 times [2020-08-21 16:21:08,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:08,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907363398] [2020-08-21 16:21:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,498 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 16:21:08,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:21:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 16:21:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:21:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:21:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 16:21:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 16:21:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:21:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:21:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 16:21:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 16:21:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 16:21:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:21:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-21 16:21:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:21:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:21:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-21 16:21:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-21 16:21:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:21:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-21 16:21:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-21 16:21:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:21:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 16:21:08,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907363398] [2020-08-21 16:21:08,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:21:08,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 16:21:08,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328788119] [2020-08-21 16:21:08,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:21:08,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:21:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:21:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:21:08,765 INFO L87 Difference]: Start difference. First operand 2262 states and 2722 transitions. Second operand 12 states. [2020-08-21 16:21:09,239 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:09,961 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:12,906 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 16:21:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:21:14,057 INFO L93 Difference]: Finished difference Result 6575 states and 8594 transitions. [2020-08-21 16:21:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-21 16:21:14,058 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 182 [2020-08-21 16:21:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:21:14,087 INFO L225 Difference]: With dead ends: 6575 [2020-08-21 16:21:14,088 INFO L226 Difference]: Without dead ends: 4657 [2020-08-21 16:21:14,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2020-08-21 16:21:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4657 states. [2020-08-21 16:21:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4657 to 3630. [2020-08-21 16:21:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3630 states. [2020-08-21 16:21:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 4309 transitions. [2020-08-21 16:21:14,827 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 4309 transitions. Word has length 182 [2020-08-21 16:21:14,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:21:14,828 INFO L479 AbstractCegarLoop]: Abstraction has 3630 states and 4309 transitions. [2020-08-21 16:21:14,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 16:21:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 4309 transitions. [2020-08-21 16:21:14,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-08-21 16:21:14,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:21:14,839 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-21 16:21:14,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:21:14,840 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:21:14,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:21:14,840 INFO L82 PathProgramCache]: Analyzing trace with hash 464766112, now seen corresponding path program 1 times [2020-08-21 16:21:14,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:21:14,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994946860] [2020-08-21 16:21:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:21:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 16:21:14,947 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 16:21:14,947 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:21:14,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 16:21:15,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:21:15 BoogieIcfgContainer [2020-08-21 16:21:15,009 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:21:15,016 INFO L168 Benchmark]: Toolchain (without parser) took 52843.80 ms. Allocated memory was 137.9 MB in the beginning and 1.0 GB in the end (delta: 889.7 MB). Free memory was 99.7 MB in the beginning and 115.5 MB in the end (delta: -15.8 MB). Peak memory consumption was 873.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:21:15,018 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 16:21:15,022 INFO L168 Benchmark]: CACSL2BoogieTranslator took 646.91 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 99.5 MB in the beginning and 166.1 MB in the end (delta: -66.5 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:21:15,024 INFO L168 Benchmark]: Boogie Preprocessor took 91.84 ms. Allocated memory is still 200.3 MB. Free memory was 166.1 MB in the beginning and 161.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-21 16:21:15,025 INFO L168 Benchmark]: RCFGBuilder took 1148.28 ms. Allocated memory was 200.3 MB in the beginning and 230.7 MB in the end (delta: 30.4 MB). Free memory was 161.9 MB in the beginning and 191.2 MB in the end (delta: -29.3 MB). Peak memory consumption was 84.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:21:15,028 INFO L168 Benchmark]: TraceAbstraction took 50951.93 ms. Allocated memory was 230.7 MB in the beginning and 1.0 GB in the end (delta: 796.9 MB). Free memory was 191.2 MB in the beginning and 115.5 MB in the end (delta: 75.6 MB). Peak memory consumption was 872.5 MB. Max. memory is 7.1 GB. [2020-08-21 16:21:15,033 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 646.91 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 99.5 MB in the beginning and 166.1 MB in the end (delta: -66.5 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 91.84 ms. Allocated memory is still 200.3 MB. Free memory was 166.1 MB in the beginning and 161.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1148.28 ms. Allocated memory was 200.3 MB in the beginning and 230.7 MB in the end (delta: 30.4 MB). Free memory was 161.9 MB in the beginning and 191.2 MB in the end (delta: -29.3 MB). Peak memory consumption was 84.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 50951.93 ms. Allocated memory was 230.7 MB in the beginning and 1.0 GB in the end (delta: 796.9 MB). Free memory was 191.2 MB in the beginning and 115.5 MB in the end (delta: 75.6 MB). Peak memory consumption was 872.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 44]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L132] int pumpRunning = 0; [L133] int systemActive = 1; [L364] int cleanupTimeShifts = 4; [L462] int methAndRunningLastTime ; [L502] int waterLevel = 1; [L503] int methaneLevelCritical = 0; [L765] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L439] int retValue_acc ; [L440] int tmp ; [L444] FCALL select_helpers() [L445] FCALL select_features() [L446] CALL, EXPR valid_product() [L355] int retValue_acc ; [L358] retValue_acc = 1 [L359] return (retValue_acc); [L446] RET, EXPR valid_product() [L446] tmp = valid_product() [L448] COND TRUE \read(tmp) [L450] FCALL setup() [L451] CALL runTest() [L432] CALL __utac_acc__Specification2_spec__1() [L467] methAndRunningLastTime = 0 [L432] RET __utac_acc__Specification2_spec__1() [L433] CALL test() [L56] int splverifierCounter ; [L57] int tmp ; [L58] int tmp___0 ; [L59] int tmp___1 ; [L60] int tmp___2 ; [L63] splverifierCounter = 0 [L65] COND TRUE 1 [L67] COND TRUE splverifierCounter < 4 [L73] tmp = __VERIFIER_nondet_int() [L75] COND TRUE \read(tmp) [L77] CALL waterRise() [L520] COND TRUE waterLevel < 2 [L521] waterLevel = waterLevel + 1 [L77] RET waterRise() [L83] tmp___0 = __VERIFIER_nondet_int() [L85] COND FALSE !(\read(tmp___0)) [L93] tmp___2 = __VERIFIER_nondet_int() [L95] COND FALSE !(\read(tmp___2)) [L101] tmp___1 = __VERIFIER_nondet_int() [L103] COND FALSE !(\read(tmp___1)) [L112] CALL timeShift() [L140] COND FALSE !(\read(pumpRunning)) [L147] COND TRUE \read(systemActive) [L149] CALL processEnvironment() [L169] int tmp ; [L172] COND TRUE ! pumpRunning [L174] CALL, EXPR isHighWaterLevel() [L284] int retValue_acc ; [L285] int tmp ; [L286] int tmp___0 ; [L290] CALL, EXPR isHighWaterSensorDry() [L582] int retValue_acc ; [L585] COND FALSE !(waterLevel < 2) [L589] retValue_acc = 0 [L590] return (retValue_acc); [L290] RET, EXPR isHighWaterSensorDry() [L290] tmp = isHighWaterSensorDry() [L292] COND FALSE !(\read(tmp)) [L295] tmp___0 = 1 [L297] retValue_acc = tmp___0 [L298] return (retValue_acc); [L174] RET, EXPR isHighWaterLevel() [L174] tmp = isHighWaterLevel() [L176] COND TRUE \read(tmp) [L178] CALL activatePump() [L203] int tmp ; [L207] CALL, EXPR isMethaneAlarm() [L228] int retValue_acc ; [L232] CALL, EXPR isMethaneLevelCritical() [L541] int retValue_acc ; [L544] retValue_acc = methaneLevelCritical [L545] return (retValue_acc); [L232] RET, EXPR isMethaneLevelCritical() [L232] retValue_acc = isMethaneLevelCritical() [L234] return (retValue_acc); [L207] RET, EXPR isMethaneAlarm() [L207] tmp = isMethaneAlarm() [L209] COND FALSE !(\read(tmp)) [L213] CALL activatePump__wrappee__highWaterSensor() [L197] pumpRunning = 1 [L213] RET activatePump__wrappee__highWaterSensor() [L178] RET activatePump() [L149] RET processEnvironment() [L155] CALL __utac_acc__Specification2_spec__2() [L472] int tmp ; [L473] int tmp___0 ; [L477] CALL, EXPR isMethaneLevelCritical() [L541] int retValue_acc ; [L544] retValue_acc = methaneLevelCritical [L545] return (retValue_acc); [L477] RET, EXPR isMethaneLevelCritical() [L477] tmp = isMethaneLevelCritical() [L479] COND FALSE !(\read(tmp)) [L495] methAndRunningLastTime = 0 [L155] RET __utac_acc__Specification2_spec__2() [L112] RET timeShift() [L65] COND TRUE 1 [L67] COND TRUE splverifierCounter < 4 [L73] tmp = __VERIFIER_nondet_int() [L75] COND FALSE !(\read(tmp)) [L83] tmp___0 = __VERIFIER_nondet_int() [L85] COND TRUE \read(tmp___0) [L87] CALL changeMethaneLevel() [L532] COND FALSE !(\read(methaneLevelCritical)) [L535] methaneLevelCritical = 1 [L87] RET changeMethaneLevel() [L93] tmp___2 = __VERIFIER_nondet_int() [L95] COND FALSE !(\read(tmp___2)) [L101] tmp___1 = __VERIFIER_nondet_int() [L103] COND FALSE !(\read(tmp___1)) [L112] CALL timeShift() [L140] COND TRUE \read(pumpRunning) [L142] CALL lowerWaterLevel() [L508] COND TRUE waterLevel > 0 [L509] waterLevel = waterLevel - 1 [L142] RET lowerWaterLevel() [L147] COND TRUE \read(systemActive) [L149] CALL processEnvironment() [L169] int tmp ; [L172] COND FALSE !(! pumpRunning) [L187] FCALL processEnvironment__wrappee__base() [L149] RET processEnvironment() [L155] CALL __utac_acc__Specification2_spec__2() [L472] int tmp ; [L473] int tmp___0 ; [L477] CALL, EXPR isMethaneLevelCritical() [L541] int retValue_acc ; [L544] retValue_acc = methaneLevelCritical [L545] return (retValue_acc); [L477] RET, EXPR isMethaneLevelCritical() [L477] tmp = isMethaneLevelCritical() [L479] COND TRUE \read(tmp) [L481] CALL, EXPR isPumpRunning() [L239] int retValue_acc ; [L242] retValue_acc = pumpRunning [L243] return (retValue_acc); [L481] RET, EXPR isPumpRunning() [L481] tmp___0 = isPumpRunning() [L483] COND TRUE \read(tmp___0) [L484] COND FALSE !(\read(methAndRunningLastTime)) [L489] methAndRunningLastTime = 1 [L155] RET __utac_acc__Specification2_spec__2() [L112] RET timeShift() [L65] COND TRUE 1 [L67] COND TRUE splverifierCounter < 4 [L73] tmp = __VERIFIER_nondet_int() [L75] COND FALSE !(\read(tmp)) [L83] tmp___0 = __VERIFIER_nondet_int() [L85] COND FALSE !(\read(tmp___0)) [L93] tmp___2 = __VERIFIER_nondet_int() [L95] COND FALSE !(\read(tmp___2)) [L101] tmp___1 = __VERIFIER_nondet_int() [L103] COND FALSE !(\read(tmp___1)) [L112] CALL timeShift() [L140] COND TRUE \read(pumpRunning) [L142] CALL lowerWaterLevel() [L508] COND TRUE waterLevel > 0 [L509] waterLevel = waterLevel - 1 [L142] RET lowerWaterLevel() [L147] COND TRUE \read(systemActive) [L149] CALL processEnvironment() [L169] int tmp ; [L172] COND FALSE !(! pumpRunning) [L187] FCALL processEnvironment__wrappee__base() [L149] RET processEnvironment() [L155] CALL __utac_acc__Specification2_spec__2() [L472] int tmp ; [L473] int tmp___0 ; [L477] CALL, EXPR isMethaneLevelCritical() [L541] int retValue_acc ; [L544] retValue_acc = methaneLevelCritical [L545] return (retValue_acc); [L477] RET, EXPR isMethaneLevelCritical() [L477] tmp = isMethaneLevelCritical() [L479] COND TRUE \read(tmp) [L481] CALL, EXPR isPumpRunning() [L239] int retValue_acc ; [L242] retValue_acc = pumpRunning [L243] return (retValue_acc); [L481] RET, EXPR isPumpRunning() [L481] tmp___0 = isPumpRunning() [L483] COND TRUE \read(tmp___0) [L484] COND TRUE \read(methAndRunningLastTime) [L486] CALL __automaton_fail() [L44] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 237 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 50.8s, OverallIterations: 12, TraceHistogramMax: 4, AutomataDifference: 41.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1485 SDtfs, 5117 SDslu, 1962 SDs, 0 SdLazy, 10471 SolverSat, 4220 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 632 GetRequests, 385 SyntacticMatches, 8 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1844 ImplicationChecksByTransitivity, 16.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3630occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 3714 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 1191 NumberOfCodeBlocks, 1191 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 998 ConstructedInterpolants, 0 QuantifiedInterpolants, 370978 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 119/145 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...