/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --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_spec4_product56.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:52:03,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:52:03,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:52:03,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:52:03,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:52:03,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:52:03,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:52:03,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:52:03,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:52:03,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:52:03,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:52:03,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:52:03,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:52:03,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:52:03,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:52:03,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:52:03,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:52:03,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:52:03,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:52:03,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:52:03,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:52:03,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:52:03,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:52:03,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:52:03,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:52:03,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:52:03,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:52:03,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:52:03,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:52:03,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:52:03,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:52:03,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:52:03,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:52:03,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:52:03,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:52:03,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:52:03,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:52:03,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:52:03,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:52:03,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:52:03,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:52:03,984 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 22:52:04,007 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:52:04,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:52:04,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:52:04,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:52:04,009 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:52:04,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:52:04,010 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:52:04,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:52:04,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:52:04,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:52:04,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:52:04,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:52:04,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:52:04,011 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:52:04,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:52:04,012 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:52:04,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:52:04,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:52:04,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:52:04,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:52:04,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:52:04,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:52:04,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:52:04,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:52:04,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:52:04,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:52:04,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:52:04,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:52:04,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:52:04,014 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 22:52:04,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:52:04,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:52:04,354 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:52:04,356 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:52:04,357 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:52:04,358 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2020-08-21 22:52:04,438 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d70bc885/f3de605f5ee0444bae9398745530f434/FLAGa7ab98f65 [2020-08-21 22:52:04,987 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:52:04,988 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2020-08-21 22:52:05,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d70bc885/f3de605f5ee0444bae9398745530f434/FLAGa7ab98f65 [2020-08-21 22:52:05,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d70bc885/f3de605f5ee0444bae9398745530f434 [2020-08-21 22:52:05,299 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:52:05,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:52:05,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:52:05,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:52:05,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:52:05,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:52:05" (1/1) ... [2020-08-21 22:52:05,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18283abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:52:05, skipping insertion in model container [2020-08-21 22:52:05,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:52:05" (1/1) ... [2020-08-21 22:52:05,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:52:05,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:52:05,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:52:05,878 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:52:05,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:52:06,019 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:52:06,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:52:06 WrapperNode [2020-08-21 22:52:06,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:52:06,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:52:06,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:52:06,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:52:06,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:52:06" (1/1) ... [2020-08-21 22:52:06,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:52:06" (1/1) ... [2020-08-21 22:52:06,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:52:06" (1/1) ... [2020-08-21 22:52:06,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:52:06" (1/1) ... [2020-08-21 22:52:06,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:52:06" (1/1) ... [2020-08-21 22:52:06,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:52:06" (1/1) ... [2020-08-21 22:52:06,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:52:06" (1/1) ... [2020-08-21 22:52:06,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:52:06,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:52:06,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:52:06,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:52:06,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:52:06" (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 22:52:06,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:52:06,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:52:06,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 22:52:06,232 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 22:52:06,233 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 22:52:06,234 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 22:52:06,234 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-21 22:52:06,234 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 22:52:06,234 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 22:52:06,235 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 22:52:06,235 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 22:52:06,236 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 22:52:06,236 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 22:52:06,236 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 22:52:06,236 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 22:52:06,237 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 22:52:06,238 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 22:52:06,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 22:52:06,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 22:52:06,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 22:52:06,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 22:52:06,239 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 22:52:06,239 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 22:52:06,239 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 22:52:06,239 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 22:52:06,240 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 22:52:06,240 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 22:52:06,241 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 22:52:06,241 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 22:52:06,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:52:06,241 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 22:52:06,241 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 22:52:06,241 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 22:52:06,242 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 22:52:06,242 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 22:52:06,242 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 22:52:06,242 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 22:52:06,242 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 22:52:06,243 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 22:52:06,243 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 22:52:06,243 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 22:52:06,243 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 22:52:06,243 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 22:52:06,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:52:06,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:52:06,244 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 22:52:06,245 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 22:52:06,245 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 22:52:06,245 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 22:52:06,246 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 22:52:06,246 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 22:52:06,246 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 22:52:06,246 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 22:52:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 22:52:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 22:52:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 22:52:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 22:52:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 22:52:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 22:52:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 22:52:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 22:52:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 22:52:06,249 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 22:52:06,249 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 22:52:06,249 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-21 22:52:06,249 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 22:52:06,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 22:52:06,249 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 22:52:06,249 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 22:52:06,250 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 22:52:06,250 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 22:52:06,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 22:52:06,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 22:52:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 22:52:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 22:52:06,253 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 22:52:06,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 22:52:06,253 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 22:52:06,253 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 22:52:06,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 22:52:06,254 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 22:52:06,254 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 22:52:06,255 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 22:52:06,255 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 22:52:06,255 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 22:52:06,255 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 22:52:06,255 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 22:52:06,255 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 22:52:06,255 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 22:52:06,256 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 22:52:06,256 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 22:52:06,256 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 22:52:06,256 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 22:52:06,256 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 22:52:06,256 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 22:52:06,257 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:52:06,257 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 22:52:06,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:52:06,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 22:52:06,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:52:07,335 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:52:07,335 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 22:52:07,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:52:07 BoogieIcfgContainer [2020-08-21 22:52:07,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:52:07,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:52:07,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:52:07,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:52:07,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:52:05" (1/3) ... [2020-08-21 22:52:07,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa5409c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:52:07, skipping insertion in model container [2020-08-21 22:52:07,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:52:06" (2/3) ... [2020-08-21 22:52:07,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa5409c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:52:07, skipping insertion in model container [2020-08-21 22:52:07,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:52:07" (3/3) ... [2020-08-21 22:52:07,349 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product56.cil.c [2020-08-21 22:52:07,360 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:52:07,368 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:52:07,382 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:52:07,407 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:52:07,408 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:52:07,408 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:52:07,408 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:52:07,408 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:52:07,409 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:52:07,409 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:52:07,409 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:52:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2020-08-21 22:52:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 22:52:07,446 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:52:07,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:52:07,449 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:52:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:52:07,461 INFO L82 PathProgramCache]: Analyzing trace with hash -559348317, now seen corresponding path program 1 times [2020-08-21 22:52:07,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:52:07,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607106230] [2020-08-21 22:52:07,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:52:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:08,083 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:52:08,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:52:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:08,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:52:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:08,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:52:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:08,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:52:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:08,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:52:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:08,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 22:52:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:08,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 22:52:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:08,254 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 22:52:08,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607106230] [2020-08-21 22:52:08,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:52:08,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:52:08,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680854548] [2020-08-21 22:52:08,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:52:08,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:52:08,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:52:08,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:52:08,284 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 3 states. [2020-08-21 22:52:09,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:52:09,741 INFO L93 Difference]: Finished difference Result 358 states and 464 transitions. [2020-08-21 22:52:09,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:52:09,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 22:52:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:52:09,759 INFO L225 Difference]: With dead ends: 358 [2020-08-21 22:52:09,759 INFO L226 Difference]: Without dead ends: 193 [2020-08-21 22:52:09,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:52:09,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-21 22:52:09,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 156. [2020-08-21 22:52:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-21 22:52:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 184 transitions. [2020-08-21 22:52:09,898 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 184 transitions. Word has length 46 [2020-08-21 22:52:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:52:09,899 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 184 transitions. [2020-08-21 22:52:09,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:52:09,899 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 184 transitions. [2020-08-21 22:52:09,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 22:52:09,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:52:09,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:52:09,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:52:09,903 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:52:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:52:09,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1620740414, now seen corresponding path program 1 times [2020-08-21 22:52:09,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:52:09,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407333593] [2020-08-21 22:52:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:52:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:10,232 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:52:10,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:52:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:10,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:52:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:10,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:52:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:10,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:52:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:10,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:52:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:10,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:52:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:10,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 22:52:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:10,275 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 22:52:10,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407333593] [2020-08-21 22:52:10,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:52:10,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 22:52:10,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788147475] [2020-08-21 22:52:10,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 22:52:10,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:52:10,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 22:52:10,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 22:52:10,279 INFO L87 Difference]: Start difference. First operand 156 states and 184 transitions. Second operand 4 states. [2020-08-21 22:52:10,753 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:11,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:52:11,824 INFO L93 Difference]: Finished difference Result 281 states and 343 transitions. [2020-08-21 22:52:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:52:11,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 22:52:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:52:11,828 INFO L225 Difference]: With dead ends: 281 [2020-08-21 22:52:11,828 INFO L226 Difference]: Without dead ends: 177 [2020-08-21 22:52:11,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:52:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-08-21 22:52:11,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 147. [2020-08-21 22:52:11,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-08-21 22:52:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2020-08-21 22:52:11,878 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 47 [2020-08-21 22:52:11,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:52:11,878 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2020-08-21 22:52:11,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 22:52:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2020-08-21 22:52:11,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 22:52:11,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:52:11,881 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 22:52:11,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:52:11,882 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:52:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:52:11,882 INFO L82 PathProgramCache]: Analyzing trace with hash -396868600, now seen corresponding path program 1 times [2020-08-21 22:52:11,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:52:11,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743843104] [2020-08-21 22:52:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:52:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:12,176 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:52:12,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:52:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:12,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:52:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:12,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:52:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:12,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:52:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:12,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:52:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:12,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 22:52:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:12,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 22:52:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:12,280 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 22:52:12,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743843104] [2020-08-21 22:52:12,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:52:12,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:52:12,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631888259] [2020-08-21 22:52:12,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:52:12,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:52:12,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:52:12,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:52:12,283 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand 8 states. [2020-08-21 22:52:12,662 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:52:13,001 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:13,253 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:13,480 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:14,255 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:52:16,461 INFO L93 Difference]: Finished difference Result 500 states and 619 transitions. [2020-08-21 22:52:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:52:16,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 22:52:16,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:52:16,475 INFO L225 Difference]: With dead ends: 500 [2020-08-21 22:52:16,475 INFO L226 Difference]: Without dead ends: 377 [2020-08-21 22:52:16,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:52:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-08-21 22:52:16,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 308. [2020-08-21 22:52:16,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-08-21 22:52:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 372 transitions. [2020-08-21 22:52:16,556 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 372 transitions. Word has length 52 [2020-08-21 22:52:16,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:52:16,556 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 372 transitions. [2020-08-21 22:52:16,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:52:16,557 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 372 transitions. [2020-08-21 22:52:16,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 22:52:16,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:52:16,560 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 22:52:16,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:52:16,560 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:52:16,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:52:16,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1317156286, now seen corresponding path program 1 times [2020-08-21 22:52:16,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:52:16,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176276832] [2020-08-21 22:52:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:52:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:16,859 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:52:16,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:52:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:16,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:52:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:16,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:52:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:16,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:52:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:16,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:52:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:16,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:52:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:16,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 22:52:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:16,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 22:52:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:17,010 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 22:52:17,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176276832] [2020-08-21 22:52:17,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:52:17,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 22:52:17,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892606994] [2020-08-21 22:52:17,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:52:17,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:52:17,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:52:17,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:52:17,013 INFO L87 Difference]: Start difference. First operand 308 states and 372 transitions. Second operand 12 states. [2020-08-21 22:52:17,492 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:52:17,793 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:18,089 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:18,332 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:18,873 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:19,738 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:20,135 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 22:52:20,466 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 22:52:20,730 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 22:52:21,023 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:52:21,459 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 22:52:21,829 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 22:52:22,251 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:24,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:52:24,608 INFO L93 Difference]: Finished difference Result 1257 states and 1722 transitions. [2020-08-21 22:52:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 22:52:24,609 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-21 22:52:24,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:52:24,620 INFO L225 Difference]: With dead ends: 1257 [2020-08-21 22:52:24,620 INFO L226 Difference]: Without dead ends: 973 [2020-08-21 22:52:24,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-21 22:52:24,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-08-21 22:52:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 872. [2020-08-21 22:52:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-21 22:52:24,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1114 transitions. [2020-08-21 22:52:24,874 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1114 transitions. Word has length 57 [2020-08-21 22:52:24,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:52:24,874 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1114 transitions. [2020-08-21 22:52:24,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:52:24,875 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1114 transitions. [2020-08-21 22:52:24,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 22:52:24,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:52:24,880 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] [2020-08-21 22:52:24,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:52:24,881 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:52:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:52:24,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1811637144, now seen corresponding path program 1 times [2020-08-21 22:52:24,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:52:24,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351520558] [2020-08-21 22:52:24,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:52:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:25,149 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:52:25,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:52:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:25,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:52:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:25,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:52:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:25,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:52:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:25,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:52:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:25,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:52:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:25,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 22:52:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:25,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 22:52:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:25,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 22:52:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:25,262 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 22:52:25,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351520558] [2020-08-21 22:52:25,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:52:25,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:52:25,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568769871] [2020-08-21 22:52:25,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:52:25,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:52:25,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:52:25,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:52:25,265 INFO L87 Difference]: Start difference. First operand 872 states and 1114 transitions. Second operand 6 states. [2020-08-21 22:52:25,614 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:52:27,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:52:27,868 INFO L93 Difference]: Finished difference Result 2053 states and 2819 transitions. [2020-08-21 22:52:27,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:52:27,879 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-21 22:52:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:52:27,894 INFO L225 Difference]: With dead ends: 2053 [2020-08-21 22:52:27,895 INFO L226 Difference]: Without dead ends: 1205 [2020-08-21 22:52:27,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:52:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2020-08-21 22:52:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1114. [2020-08-21 22:52:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1114 states. [2020-08-21 22:52:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1402 transitions. [2020-08-21 22:52:28,188 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1402 transitions. Word has length 61 [2020-08-21 22:52:28,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:52:28,189 INFO L479 AbstractCegarLoop]: Abstraction has 1114 states and 1402 transitions. [2020-08-21 22:52:28,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:52:28,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1402 transitions. [2020-08-21 22:52:28,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 22:52:28,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:52:28,193 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:28,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:52:28,194 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:52:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:52:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1078445760, now seen corresponding path program 1 times [2020-08-21 22:52:28,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:52:28,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279504162] [2020-08-21 22:52:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:52:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,479 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:52:28,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:52:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:52:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:52:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:52:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:52:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 22:52:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:52:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 22:52:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 22:52:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 22:52:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 22:52:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 22:52:28,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279504162] [2020-08-21 22:52:28,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:52:28,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:52:28,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513007534] [2020-08-21 22:52:28,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:52:28,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:52:28,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:52:28,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:52:28,626 INFO L87 Difference]: Start difference. First operand 1114 states and 1402 transitions. Second operand 10 states. [2020-08-21 22:52:29,230 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-21 22:52:29,835 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:52:31,875 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:52:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:52:34,128 INFO L93 Difference]: Finished difference Result 2165 states and 2849 transitions. [2020-08-21 22:52:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 22:52:34,129 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-21 22:52:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:52:34,138 INFO L225 Difference]: With dead ends: 2165 [2020-08-21 22:52:34,138 INFO L226 Difference]: Without dead ends: 1340 [2020-08-21 22:52:34,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-21 22:52:34,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2020-08-21 22:52:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1227. [2020-08-21 22:52:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2020-08-21 22:52:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1523 transitions. [2020-08-21 22:52:34,393 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1523 transitions. Word has length 89 [2020-08-21 22:52:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:52:34,396 INFO L479 AbstractCegarLoop]: Abstraction has 1227 states and 1523 transitions. [2020-08-21 22:52:34,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:52:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1523 transitions. [2020-08-21 22:52:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-21 22:52:34,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:52:34,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:34,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:52:34,404 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:52:34,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:52:34,404 INFO L82 PathProgramCache]: Analyzing trace with hash -478965993, now seen corresponding path program 1 times [2020-08-21 22:52:34,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:52:34,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661767693] [2020-08-21 22:52:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:52:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,700 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:52:34,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:52:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:52:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:52:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:52:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:52:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 22:52:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:52:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 22:52:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 22:52:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 22:52:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 22:52:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 22:52:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-21 22:52:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 22:52:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 22:52:34,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661767693] [2020-08-21 22:52:34,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:52:34,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 22:52:34,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015130451] [2020-08-21 22:52:34,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:52:34,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:52:34,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:52:34,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:52:34,902 INFO L87 Difference]: Start difference. First operand 1227 states and 1523 transitions. Second operand 9 states. [2020-08-21 22:52:36,062 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:36,281 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:36,538 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:52:37,582 INFO L93 Difference]: Finished difference Result 2268 states and 2960 transitions. [2020-08-21 22:52:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:52:37,583 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 137 [2020-08-21 22:52:37,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:52:37,592 INFO L225 Difference]: With dead ends: 2268 [2020-08-21 22:52:37,592 INFO L226 Difference]: Without dead ends: 1353 [2020-08-21 22:52:37,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:52:37,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2020-08-21 22:52:37,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1227. [2020-08-21 22:52:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2020-08-21 22:52:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1521 transitions. [2020-08-21 22:52:37,958 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1521 transitions. Word has length 137 [2020-08-21 22:52:37,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:52:37,959 INFO L479 AbstractCegarLoop]: Abstraction has 1227 states and 1521 transitions. [2020-08-21 22:52:37,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:52:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1521 transitions. [2020-08-21 22:52:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 22:52:37,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:52:37,965 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:37,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:52:37,966 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:52:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:52:37,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1688312402, now seen corresponding path program 1 times [2020-08-21 22:52:37,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:52:37,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317019985] [2020-08-21 22:52:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:52:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,232 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:52:38,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:52:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:52:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:52:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:52:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:52:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:52:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 22:52:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 22:52:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 22:52:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 22:52:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 22:52:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-21 22:52:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-21 22:52:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 22:52:38,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317019985] [2020-08-21 22:52:38,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:52:38,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:52:38,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716706544] [2020-08-21 22:52:38,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:52:38,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:52:38,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:52:38,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:52:38,450 INFO L87 Difference]: Start difference. First operand 1227 states and 1521 transitions. Second operand 10 states. [2020-08-21 22:52:39,498 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:39,755 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 22:52:39,998 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:40,247 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:41,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:52:41,305 INFO L93 Difference]: Finished difference Result 2564 states and 3284 transitions. [2020-08-21 22:52:41,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:52:41,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-21 22:52:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:52:41,314 INFO L225 Difference]: With dead ends: 2564 [2020-08-21 22:52:41,315 INFO L226 Difference]: Without dead ends: 1361 [2020-08-21 22:52:41,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:52:41,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2020-08-21 22:52:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1247. [2020-08-21 22:52:41,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1247 states. [2020-08-21 22:52:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1543 transitions. [2020-08-21 22:52:41,553 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1543 transitions. Word has length 133 [2020-08-21 22:52:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:52:41,554 INFO L479 AbstractCegarLoop]: Abstraction has 1247 states and 1543 transitions. [2020-08-21 22:52:41,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:52:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1543 transitions. [2020-08-21 22:52:41,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-21 22:52:41,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:52:41,564 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:41,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:52:41,564 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:52:41,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:52:41,565 INFO L82 PathProgramCache]: Analyzing trace with hash 545809936, now seen corresponding path program 1 times [2020-08-21 22:52:41,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:52:41,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999872807] [2020-08-21 22:52:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:52:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:41,851 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:52:41,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:52:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:41,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:52:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:41,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:52:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:41,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:52:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:41,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:52:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:41,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:52:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:41,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:41,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:41,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:41,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:42,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:42,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 22:52:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:42,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 22:52:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:42,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:42,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 22:52:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:42,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 22:52:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:42,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:42,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:42,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 22:52:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:42,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-21 22:52:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:42,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-21 22:52:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 22:52:42,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999872807] [2020-08-21 22:52:42,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:52:42,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:52:42,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602051119] [2020-08-21 22:52:42,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:52:42,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:52:42,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:52:42,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:52:42,120 INFO L87 Difference]: Start difference. First operand 1247 states and 1543 transitions. Second operand 12 states. [2020-08-21 22:52:42,794 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:43,110 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:43,344 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:44,117 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:44,369 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:44,607 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:52:45,771 INFO L93 Difference]: Finished difference Result 2351 states and 3005 transitions. [2020-08-21 22:52:45,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 22:52:45,772 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 133 [2020-08-21 22:52:45,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:52:45,779 INFO L225 Difference]: With dead ends: 2351 [2020-08-21 22:52:45,779 INFO L226 Difference]: Without dead ends: 1128 [2020-08-21 22:52:45,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 22:52:45,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-08-21 22:52:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1070. [2020-08-21 22:52:45,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-08-21 22:52:45,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1296 transitions. [2020-08-21 22:52:45,973 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1296 transitions. Word has length 133 [2020-08-21 22:52:45,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:52:45,974 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1296 transitions. [2020-08-21 22:52:45,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:52:45,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1296 transitions. [2020-08-21 22:52:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-21 22:52:45,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:52:45,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:45,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:52:45,979 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:52:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:52:45,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1621468459, now seen corresponding path program 1 times [2020-08-21 22:52:45,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:52:45,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558920982] [2020-08-21 22:52:45,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:52:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,277 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:52:46,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:52:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:52:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:52:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:52:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:52:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 22:52:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:52:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 22:52:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 22:52:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 22:52:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 22:52:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 22:52:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-21 22:52:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 22:52:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 22:52:46,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558920982] [2020-08-21 22:52:46,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:52:46,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 22:52:46,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378082429] [2020-08-21 22:52:46,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:52:46,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:52:46,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:52:46,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:52:46,574 INFO L87 Difference]: Start difference. First operand 1070 states and 1296 transitions. Second operand 13 states. [2020-08-21 22:52:47,420 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:52:48,219 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:50,501 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:50,751 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:50,993 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:51,223 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 22:52:51,468 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:51,709 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 22:52:51,937 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:52,221 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 22:52:52,484 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 22:52:52,717 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 22:52:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:52:53,683 INFO L93 Difference]: Finished difference Result 3048 states and 3818 transitions. [2020-08-21 22:52:53,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 22:52:53,683 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-08-21 22:52:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:52:53,694 INFO L225 Difference]: With dead ends: 3048 [2020-08-21 22:52:53,694 INFO L226 Difference]: Without dead ends: 2002 [2020-08-21 22:52:53,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 22:52:53,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2020-08-21 22:52:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1897. [2020-08-21 22:52:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2020-08-21 22:52:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2260 transitions. [2020-08-21 22:52:54,127 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2260 transitions. Word has length 137 [2020-08-21 22:52:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:52:54,129 INFO L479 AbstractCegarLoop]: Abstraction has 1897 states and 2260 transitions. [2020-08-21 22:52:54,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:52:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2260 transitions. [2020-08-21 22:52:54,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-21 22:52:54,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:52:54,134 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:54,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:52:54,135 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:52:54,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:52:54,135 INFO L82 PathProgramCache]: Analyzing trace with hash -671261639, now seen corresponding path program 1 times [2020-08-21 22:52:54,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:52:54,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947091196] [2020-08-21 22:52:54,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:52:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,449 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:52:54,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:52:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:52:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:52:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:52:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:52:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 22:52:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 22:52:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 22:52:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 22:52:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 22:52:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 22:52:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 22:52:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 22:52:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-21 22:52:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-21 22:52:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 22:52:54,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947091196] [2020-08-21 22:52:54,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:52:54,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:52:54,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399235949] [2020-08-21 22:52:54,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:52:54,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:52:54,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:52:54,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:52:54,734 INFO L87 Difference]: Start difference. First operand 1897 states and 2260 transitions. Second operand 11 states. [2020-08-21 22:52:55,168 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:52:57,265 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:57,531 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:57,777 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:52:58,200 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:52:58,451 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:52:58,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:52:58,856 INFO L93 Difference]: Finished difference Result 2235 states and 2855 transitions. [2020-08-21 22:52:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 22:52:58,862 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 141 [2020-08-21 22:52:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:52:58,875 INFO L225 Difference]: With dead ends: 2235 [2020-08-21 22:52:58,875 INFO L226 Difference]: Without dead ends: 2232 [2020-08-21 22:52:58,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-08-21 22:52:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2020-08-21 22:52:59,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1897. [2020-08-21 22:52:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2020-08-21 22:52:59,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2250 transitions. [2020-08-21 22:52:59,220 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2250 transitions. Word has length 141 [2020-08-21 22:52:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:52:59,220 INFO L479 AbstractCegarLoop]: Abstraction has 1897 states and 2250 transitions. [2020-08-21 22:52:59,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:52:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2250 transitions. [2020-08-21 22:52:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-21 22:52:59,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:52:59,226 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:52:59,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:52:59,226 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:52:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:52:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1745517035, now seen corresponding path program 1 times [2020-08-21 22:52:59,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:52:59,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52124220] [2020-08-21 22:52:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:52:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,607 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 22:52:59,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:52:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:52:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:52:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:52:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:52:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 22:52:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:52:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 22:52:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 22:52:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 22:52:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 22:52:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 22:52:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:52:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 22:52:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:52:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-21 22:52:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-21 22:52:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:52:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 22:52:59,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52124220] [2020-08-21 22:52:59,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:52:59,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:52:59,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138733623] [2020-08-21 22:52:59,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:52:59,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:52:59,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:52:59,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:52:59,849 INFO L87 Difference]: Start difference. First operand 1897 states and 2250 transitions. Second operand 12 states. [2020-08-21 22:53:00,296 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:53:01,322 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 22:53:01,612 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 22:53:01,873 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 22:53:02,110 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 22:53:02,464 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 22:53:02,724 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186