/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product50.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:42:22,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:42:22,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:42:22,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:42:22,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:42:22,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:42:22,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:42:22,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:42:22,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:42:22,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:42:22,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:42:22,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:42:22,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:42:22,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:42:22,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:42:22,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:42:22,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:42:22,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:42:22,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:42:22,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:42:22,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:42:22,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:42:22,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:42:22,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:42:22,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:42:22,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:42:22,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:42:22,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:42:22,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:42:22,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:42:22,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:42:22,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:42:22,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:42:22,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:42:22,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:42:22,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:42:22,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:42:22,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:42:22,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:42:22,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:42:22,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:42:22,502 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 [2020-08-27 21:42:22,546 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:42:22,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:42:22,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:42:22,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:42:22,548 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:42:22,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:42:22,549 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:42:22,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:42:22,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:42:22,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:42:22,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:42:22,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:42:22,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:42:22,551 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:42:22,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:42:22,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:42:22,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:42:22,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:42:22,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:42:22,553 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:42:22,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:42:22,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:42:22,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:42:22,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:42:22,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:42:22,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:42:22,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:42:22,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:42:22,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:42:22,555 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 -> false [2020-08-27 21:42:22,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:42:23,015 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:42:23,020 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:42:23,022 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:42:23,023 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:42:23,024 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product50.cil.c [2020-08-27 21:42:23,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5435e4432/8df73fb658874158b5edf03e534b83e4/FLAG6b5b82c46 [2020-08-27 21:42:23,802 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:42:23,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product50.cil.c [2020-08-27 21:42:23,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5435e4432/8df73fb658874158b5edf03e534b83e4/FLAG6b5b82c46 [2020-08-27 21:42:23,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5435e4432/8df73fb658874158b5edf03e534b83e4 [2020-08-27 21:42:24,012 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:42:24,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:42:24,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:42:24,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:42:24,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:42:24,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:42:24" (1/1) ... [2020-08-27 21:42:24,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@538d8bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:42:24, skipping insertion in model container [2020-08-27 21:42:24,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:42:24" (1/1) ... [2020-08-27 21:42:24,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:42:24,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:42:24,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:42:24,597 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:42:24,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:42:24,731 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:42:24,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:42:24 WrapperNode [2020-08-27 21:42:24,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:42:24,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:42:24,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:42:24,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:42:24,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:42:24" (1/1) ... [2020-08-27 21:42:24,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:42:24" (1/1) ... [2020-08-27 21:42:24,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:42:24" (1/1) ... [2020-08-27 21:42:24,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:42:24" (1/1) ... [2020-08-27 21:42:24,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:42:24" (1/1) ... [2020-08-27 21:42:24,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:42:24" (1/1) ... [2020-08-27 21:42:24,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:42:24" (1/1) ... [2020-08-27 21:42:24,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:42:24,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:42:24,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:42:24,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:42:24,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:42:24" (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 [2020-08-27 21:42:24,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:42:24,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:42:24,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-27 21:42:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-27 21:42:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-27 21:42:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-27 21:42:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-27 21:42:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-27 21:42:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-27 21:42:24,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-27 21:42:24,940 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-27 21:42:24,940 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-27 21:42:24,940 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-27 21:42:24,940 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-27 21:42:24,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:42:24,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-27 21:42:24,941 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-27 21:42:24,941 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-27 21:42:24,941 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-27 21:42:24,942 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-27 21:42:24,942 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-27 21:42:24,942 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-27 21:42:24,942 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-27 21:42:24,943 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-27 21:42:24,943 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-27 21:42:24,943 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-27 21:42:24,943 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-27 21:42:24,943 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-27 21:42:24,943 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-27 21:42:24,944 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-27 21:42:24,944 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-27 21:42:24,944 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-27 21:42:24,944 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-27 21:42:24,944 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-27 21:42:24,944 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-27 21:42:24,945 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-27 21:42:24,945 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-27 21:42:24,945 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-27 21:42:24,945 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-27 21:42:24,945 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-27 21:42:24,945 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-27 21:42:24,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:42:24,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:42:24,946 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-27 21:42:24,946 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-27 21:42:24,946 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-27 21:42:24,946 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-27 21:42:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-27 21:42:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-27 21:42:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-27 21:42:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-27 21:42:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-27 21:42:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-27 21:42:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-27 21:42:24,948 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-27 21:42:24,948 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-27 21:42:24,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-27 21:42:24,948 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-27 21:42:24,948 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-27 21:42:24,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-27 21:42:24,949 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-27 21:42:24,949 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-27 21:42:24,949 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-27 21:42:24,949 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-27 21:42:24,949 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-27 21:42:24,949 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-27 21:42:24,950 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-27 21:42:24,950 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-27 21:42:24,950 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-27 21:42:24,950 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-27 21:42:24,950 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-27 21:42:24,950 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-27 21:42:24,951 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-27 21:42:24,951 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-27 21:42:24,951 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-27 21:42:24,951 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-27 21:42:24,951 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-27 21:42:24,951 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:42:24,952 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-27 21:42:24,952 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-27 21:42:24,952 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-27 21:42:24,952 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-27 21:42:24,952 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-27 21:42:24,952 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-27 21:42:24,953 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-27 21:42:24,953 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-27 21:42:24,953 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-27 21:42:24,953 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-27 21:42:24,953 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-27 21:42:24,953 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-27 21:42:24,954 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-27 21:42:24,954 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-27 21:42:24,954 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-27 21:42:24,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:42:24,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-27 21:42:24,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:42:26,109 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:42:26,109 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-27 21:42:26,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:42:26 BoogieIcfgContainer [2020-08-27 21:42:26,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:42:26,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:42:26,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:42:26,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:42:26,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:42:24" (1/3) ... [2020-08-27 21:42:26,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbdc96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:42:26, skipping insertion in model container [2020-08-27 21:42:26,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:42:24" (2/3) ... [2020-08-27 21:42:26,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbdc96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:42:26, skipping insertion in model container [2020-08-27 21:42:26,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:42:26" (3/3) ... [2020-08-27 21:42:26,127 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product50.cil.c [2020-08-27 21:42:26,141 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:42:26,154 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:42:26,179 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:42:26,220 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:42:26,220 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:42:26,220 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:42:26,221 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:42:26,221 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:42:26,221 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:42:26,222 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:42:26,222 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:42:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-08-27 21:42:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-27 21:42:26,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:42:26,274 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] [2020-08-27 21:42:26,276 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:42:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:42:26,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1488722281, now seen corresponding path program 1 times [2020-08-27 21:42:26,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:42:26,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254059013] [2020-08-27 21:42:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:42:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:27,109 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-27 21:42:27,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:42:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:27,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:42:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:27,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:42:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:27,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:42:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:27,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:42:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:27,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-27 21:42:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:27,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-27 21:42:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:42:27,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254059013] [2020-08-27 21:42:27,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:42:27,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:42:27,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471905286] [2020-08-27 21:42:27,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:42:27,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:42:27,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:42:27,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:42:27,262 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 3 states. [2020-08-27 21:42:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:42:28,444 INFO L93 Difference]: Finished difference Result 306 states and 398 transitions. [2020-08-27 21:42:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:42:28,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-27 21:42:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:42:28,466 INFO L225 Difference]: With dead ends: 306 [2020-08-27 21:42:28,466 INFO L226 Difference]: Without dead ends: 165 [2020-08-27 21:42:28,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:42:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-08-27 21:42:28,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-08-27 21:42:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-27 21:42:28,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 154 transitions. [2020-08-27 21:42:28,576 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 154 transitions. Word has length 46 [2020-08-27 21:42:28,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:42:28,577 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 154 transitions. [2020-08-27 21:42:28,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:42:28,577 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 154 transitions. [2020-08-27 21:42:28,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-27 21:42:28,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:42:28,582 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] [2020-08-27 21:42:28,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:42:28,582 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:42:28,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:42:28,583 INFO L82 PathProgramCache]: Analyzing trace with hash 469599371, now seen corresponding path program 1 times [2020-08-27 21:42:28,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:42:28,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132984936] [2020-08-27 21:42:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:42:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:28,987 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-27 21:42:28,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:42:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:29,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:42:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:29,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:42:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:29,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:42:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:29,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:42:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:29,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-27 21:42:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:29,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-27 21:42:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:42:29,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132984936] [2020-08-27 21:42:29,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:42:29,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:42:29,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620420466] [2020-08-27 21:42:29,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-27 21:42:29,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:42:29,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-27 21:42:29,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-27 21:42:29,048 INFO L87 Difference]: Start difference. First operand 132 states and 154 transitions. Second operand 4 states. [2020-08-27 21:42:29,473 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:42:30,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:42:30,418 INFO L93 Difference]: Finished difference Result 235 states and 285 transitions. [2020-08-27 21:42:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:42:30,419 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-27 21:42:30,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:42:30,423 INFO L225 Difference]: With dead ends: 235 [2020-08-27 21:42:30,423 INFO L226 Difference]: Without dead ends: 149 [2020-08-27 21:42:30,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:42:30,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-27 21:42:30,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 123. [2020-08-27 21:42:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-27 21:42:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2020-08-27 21:42:30,466 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 47 [2020-08-27 21:42:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:42:30,467 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2020-08-27 21:42:30,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-27 21:42:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2020-08-27 21:42:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-27 21:42:30,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:42:30,470 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] [2020-08-27 21:42:30,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:42:30,470 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:42:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:42:30,471 INFO L82 PathProgramCache]: Analyzing trace with hash 305445596, now seen corresponding path program 1 times [2020-08-27 21:42:30,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:42:30,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538139742] [2020-08-27 21:42:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:42:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:30,901 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-27 21:42:30,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:42:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:30,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:42:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:30,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:42:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:30,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:42:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:30,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:42:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:30,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-27 21:42:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:30,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-27 21:42:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:42:30,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538139742] [2020-08-27 21:42:30,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:42:30,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-27 21:42:30,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922677242] [2020-08-27 21:42:30,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:42:30,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:42:31,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:42:31,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:42:31,000 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand 8 states. [2020-08-27 21:42:31,367 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-27 21:42:31,736 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:42:32,064 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:42:32,367 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:42:33,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:42:33,719 INFO L93 Difference]: Finished difference Result 248 states and 303 transitions. [2020-08-27 21:42:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-27 21:42:33,720 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-27 21:42:33,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:42:33,723 INFO L225 Difference]: With dead ends: 248 [2020-08-27 21:42:33,723 INFO L226 Difference]: Without dead ends: 149 [2020-08-27 21:42:33,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:42:33,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-27 21:42:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 123. [2020-08-27 21:42:33,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-27 21:42:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 141 transitions. [2020-08-27 21:42:33,761 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 141 transitions. Word has length 52 [2020-08-27 21:42:33,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:42:33,762 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 141 transitions. [2020-08-27 21:42:33,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:42:33,762 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 141 transitions. [2020-08-27 21:42:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-27 21:42:33,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:42:33,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:42:33,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:42:33,765 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:42:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:42:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash 892474279, now seen corresponding path program 1 times [2020-08-27 21:42:33,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:42:33,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638087488] [2020-08-27 21:42:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:42:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:34,123 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-27 21:42:34,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:42:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:34,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:42:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:34,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:42:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:34,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:42:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:34,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:42:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:34,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-27 21:42:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:34,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:34,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:34,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-27 21:42:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:34,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-27 21:42:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:42:34,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638087488] [2020-08-27 21:42:34,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:42:34,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-27 21:42:34,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136652274] [2020-08-27 21:42:34,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:42:34,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:42:34,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:42:34,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:42:34,236 INFO L87 Difference]: Start difference. First operand 123 states and 141 transitions. Second operand 6 states. [2020-08-27 21:42:34,658 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-27 21:42:35,901 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:42:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:42:36,669 INFO L93 Difference]: Finished difference Result 345 states and 425 transitions. [2020-08-27 21:42:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-27 21:42:36,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-27 21:42:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:42:36,673 INFO L225 Difference]: With dead ends: 345 [2020-08-27 21:42:36,674 INFO L226 Difference]: Without dead ends: 246 [2020-08-27 21:42:36,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-27 21:42:36,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-08-27 21:42:36,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 203. [2020-08-27 21:42:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-27 21:42:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 230 transitions. [2020-08-27 21:42:36,722 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 230 transitions. Word has length 65 [2020-08-27 21:42:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:42:36,723 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 230 transitions. [2020-08-27 21:42:36,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:42:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 230 transitions. [2020-08-27 21:42:36,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-27 21:42:36,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:42:36,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:42:36,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:42:36,725 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:42:36,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:42:36,726 INFO L82 PathProgramCache]: Analyzing trace with hash 861206730, now seen corresponding path program 1 times [2020-08-27 21:42:36,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:42:36,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576348686] [2020-08-27 21:42:36,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:42:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:37,130 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-27 21:42:37,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:42:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:37,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:42:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:37,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:42:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:37,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:42:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:37,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:42:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:37,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-27 21:42:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:37,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:37,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:37,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:42:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:37,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 21:42:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:37,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-27 21:42:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:37,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-27 21:42:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:42:37,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576348686] [2020-08-27 21:42:37,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:42:37,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-27 21:42:37,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496421164] [2020-08-27 21:42:37,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-27 21:42:37,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:42:37,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-27 21:42:37,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:42:37,282 INFO L87 Difference]: Start difference. First operand 203 states and 230 transitions. Second operand 12 states. [2020-08-27 21:42:37,809 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-27 21:42:38,204 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:42:38,505 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:42:38,767 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:42:39,413 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:42:40,416 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:42:40,778 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:42:41,125 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:42:41,431 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:42:41,753 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:42:42,068 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:42:43,670 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-27 21:42:44,092 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:42:44,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:42:44,805 INFO L93 Difference]: Finished difference Result 713 states and 919 transitions. [2020-08-27 21:42:44,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-27 21:42:44,806 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-08-27 21:42:44,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:42:44,811 INFO L225 Difference]: With dead ends: 713 [2020-08-27 21:42:44,812 INFO L226 Difference]: Without dead ends: 534 [2020-08-27 21:42:44,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-27 21:42:44,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-08-27 21:42:44,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 472. [2020-08-27 21:42:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2020-08-27 21:42:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 553 transitions. [2020-08-27 21:42:44,961 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 553 transitions. Word has length 79 [2020-08-27 21:42:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:42:44,961 INFO L479 AbstractCegarLoop]: Abstraction has 472 states and 553 transitions. [2020-08-27 21:42:44,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-27 21:42:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 553 transitions. [2020-08-27 21:42:44,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-08-27 21:42:44,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:42:44,966 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, 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] [2020-08-27 21:42:44,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:42:44,967 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:42:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:42:44,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1327678130, now seen corresponding path program 1 times [2020-08-27 21:42:44,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:42:44,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735931939] [2020-08-27 21:42:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:42:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,321 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-27 21:42:45,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:42:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:42:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:42:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:42:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:42:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-27 21:42:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:42:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:42:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 21:42:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-27 21:42:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:42:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-27 21:42:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-27 21:42:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-27 21:42:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:42:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-27 21:42:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-27 21:42:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-27 21:42:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-27 21:42:45,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735931939] [2020-08-27 21:42:45,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:42:45,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-27 21:42:45,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025479723] [2020-08-27 21:42:45,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-27 21:42:45,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:42:45,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-27 21:42:45,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-27 21:42:45,587 INFO L87 Difference]: Start difference. First operand 472 states and 553 transitions. Second operand 13 states. [2020-08-27 21:42:46,018 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-27 21:42:46,786 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-27 21:42:47,481 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:42:47,808 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-27 21:42:48,148 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:42:48,459 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:42:48,765 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:42:49,114 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-27 21:42:49,503 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:42:49,832 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:42:51,624 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:42:51,947 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-27 21:42:52,260 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:42:52,585 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:42:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:42:53,084 INFO L93 Difference]: Finished difference Result 957 states and 1212 transitions. [2020-08-27 21:42:53,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-27 21:42:53,085 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 138 [2020-08-27 21:42:53,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:42:53,089 INFO L225 Difference]: With dead ends: 957 [2020-08-27 21:42:53,090 INFO L226 Difference]: Without dead ends: 509 [2020-08-27 21:42:53,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-08-27 21:42:53,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2020-08-27 21:42:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 442. [2020-08-27 21:42:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-08-27 21:42:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 521 transitions. [2020-08-27 21:42:53,178 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 521 transitions. Word has length 138 [2020-08-27 21:42:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:42:53,178 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 521 transitions. [2020-08-27 21:42:53,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-27 21:42:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 521 transitions. [2020-08-27 21:42:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-27 21:42:53,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:42:53,181 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] [2020-08-27 21:42:53,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:42:53,182 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:42:53,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:42:53,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1681399932, now seen corresponding path program 1 times [2020-08-27 21:42:53,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:42:53,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969460799] [2020-08-27 21:42:53,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:42:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,526 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-27 21:42:53,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:42:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:42:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:42:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:42:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:42:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-27 21:42:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:42:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 21:42:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-27 21:42:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:42:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-27 21:42:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-27 21:42:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:42:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-27 21:42:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-27 21:42:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-27 21:42:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-27 21:42:53,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969460799] [2020-08-27 21:42:53,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:42:53,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-27 21:42:53,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981131726] [2020-08-27 21:42:53,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-27 21:42:53,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:42:53,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-27 21:42:53,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:42:53,781 INFO L87 Difference]: Start difference. First operand 442 states and 521 transitions. Second operand 12 states. [2020-08-27 21:42:54,587 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:42:54,935 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:42:55,251 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:42:55,848 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:42:56,154 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:42:56,454 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:42:57,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:42:57,546 INFO L93 Difference]: Finished difference Result 807 states and 985 transitions. [2020-08-27 21:42:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-27 21:42:57,549 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2020-08-27 21:42:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:42:57,553 INFO L225 Difference]: With dead ends: 807 [2020-08-27 21:42:57,553 INFO L226 Difference]: Without dead ends: 389 [2020-08-27 21:42:57,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-27 21:42:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-08-27 21:42:57,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 363. [2020-08-27 21:42:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-08-27 21:42:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 425 transitions. [2020-08-27 21:42:57,642 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 425 transitions. Word has length 130 [2020-08-27 21:42:57,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:42:57,642 INFO L479 AbstractCegarLoop]: Abstraction has 363 states and 425 transitions. [2020-08-27 21:42:57,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-27 21:42:57,642 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 425 transitions. [2020-08-27 21:42:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-27 21:42:57,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:42:57,646 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] [2020-08-27 21:42:57,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:42:57,647 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:42:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:42:57,647 INFO L82 PathProgramCache]: Analyzing trace with hash 34208085, now seen corresponding path program 1 times [2020-08-27 21:42:57,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:42:57,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375205998] [2020-08-27 21:42:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:42:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:57,946 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-27 21:42:57,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:42:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:57,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:42:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:57,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:42:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:57,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:42:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:57,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:42:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:57,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-27 21:42:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:42:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:42:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 21:42:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-27 21:42:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:42:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-27 21:42:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-27 21:42:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:42:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:42:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-27 21:42:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-27 21:42:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-27 21:42:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:42:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-27 21:42:58,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375205998] [2020-08-27 21:42:58,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:42:58,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-27 21:42:58,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601497267] [2020-08-27 21:42:58,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:42:58,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:42:58,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:42:58,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:42:58,152 INFO L87 Difference]: Start difference. First operand 363 states and 425 transitions. Second operand 10 states. [2020-08-27 21:42:59,673 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:43:00,012 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:43:00,291 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:43:00,526 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:43:00,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:43:00,902 INFO L93 Difference]: Finished difference Result 670 states and 812 transitions. [2020-08-27 21:43:00,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-27 21:43:00,902 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 134 [2020-08-27 21:43:00,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:43:00,906 INFO L225 Difference]: With dead ends: 670 [2020-08-27 21:43:00,906 INFO L226 Difference]: Without dead ends: 394 [2020-08-27 21:43:00,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-27 21:43:00,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-08-27 21:43:00,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 368. [2020-08-27 21:43:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-08-27 21:43:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 430 transitions. [2020-08-27 21:43:00,975 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 430 transitions. Word has length 134 [2020-08-27 21:43:00,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:43:00,976 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 430 transitions. [2020-08-27 21:43:00,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:43:00,976 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 430 transitions. [2020-08-27 21:43:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-27 21:43:00,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:43:00,978 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] [2020-08-27 21:43:00,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:43:00,979 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:43:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:43:00,979 INFO L82 PathProgramCache]: Analyzing trace with hash -475265005, now seen corresponding path program 1 times [2020-08-27 21:43:00,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:43:00,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972599075] [2020-08-27 21:43:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:43:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,363 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-27 21:43:01,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:43:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:43:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:43:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:43:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:43:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-27 21:43:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:43:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:43:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 21:43:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-27 21:43:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:43:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-27 21:43:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-27 21:43:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:43:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-27 21:43:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-27 21:43:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-27 21:43:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-27 21:43:01,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972599075] [2020-08-27 21:43:01,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:43:01,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-27 21:43:01,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077056133] [2020-08-27 21:43:01,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:43:01,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:43:01,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:43:01,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:43:01,615 INFO L87 Difference]: Start difference. First operand 368 states and 430 transitions. Second operand 10 states. [2020-08-27 21:43:02,217 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-27 21:43:04,110 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:43:04,454 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:43:04,765 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:43:05,078 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-27 21:43:05,430 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:43:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:43:05,847 INFO L93 Difference]: Finished difference Result 401 states and 482 transitions. [2020-08-27 21:43:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-27 21:43:05,848 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 134 [2020-08-27 21:43:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:43:05,851 INFO L225 Difference]: With dead ends: 401 [2020-08-27 21:43:05,851 INFO L226 Difference]: Without dead ends: 398 [2020-08-27 21:43:05,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-27 21:43:05,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-08-27 21:43:05,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 368. [2020-08-27 21:43:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-08-27 21:43:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 429 transitions. [2020-08-27 21:43:05,915 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 429 transitions. Word has length 134 [2020-08-27 21:43:05,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:43:05,915 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 429 transitions. [2020-08-27 21:43:05,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:43:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 429 transitions. [2020-08-27 21:43:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-08-27 21:43:05,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:43:05,918 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:43:05,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:43:05,918 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:43:05,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:43:05,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1918338429, now seen corresponding path program 1 times [2020-08-27 21:43:05,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:43:05,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768855588] [2020-08-27 21:43:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:43:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,299 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-27 21:43:06,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:43:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:43:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:43:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:43:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:43:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-27 21:43:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:43:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:43:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 21:43:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-27 21:43:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:43:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-27 21:43:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-27 21:43:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:43:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-27 21:43:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-27 21:43:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-27 21:43:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-27 21:43:06,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768855588] [2020-08-27 21:43:06,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:43:06,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-27 21:43:06,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273797242] [2020-08-27 21:43:06,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-27 21:43:06,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:43:06,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-27 21:43:06,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:43:06,527 INFO L87 Difference]: Start difference. First operand 368 states and 429 transitions. Second operand 12 states. [2020-08-27 21:43:07,085 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-27 21:43:08,019 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-27 21:43:08,624 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-27 21:43:08,947 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:43:09,240 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:43:09,539 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:43:09,881 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:43:10,192 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:43:12,071 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-27 21:43:12,383 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:43:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:43:13,238 INFO L93 Difference]: Finished difference Result 881 states and 1104 transitions. [2020-08-27 21:43:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-27 21:43:13,239 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 138 [2020-08-27 21:43:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:43:13,244 INFO L225 Difference]: With dead ends: 881 [2020-08-27 21:43:13,244 INFO L226 Difference]: Without dead ends: 600 [2020-08-27 21:43:13,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=270, Invalid=660, Unknown=0, NotChecked=0, Total=930 [2020-08-27 21:43:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2020-08-27 21:43:13,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 513. [2020-08-27 21:43:13,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-08-27 21:43:13,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 606 transitions. [2020-08-27 21:43:13,379 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 606 transitions. Word has length 138 [2020-08-27 21:43:13,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:43:13,380 INFO L479 AbstractCegarLoop]: Abstraction has 513 states and 606 transitions. [2020-08-27 21:43:13,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-27 21:43:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 606 transitions. [2020-08-27 21:43:13,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-08-27 21:43:13,384 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:43:13,384 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-27 21:43:13,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:43:13,385 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:43:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:43:13,385 INFO L82 PathProgramCache]: Analyzing trace with hash -169355685, now seen corresponding path program 2 times [2020-08-27 21:43:13,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:43:13,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069766662] [2020-08-27 21:43:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:43:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,792 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-27 21:43:13,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:43:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:43:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:43:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-27 21:43:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-27 21:43:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-27 21:43:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:43:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:43:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 21:43:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-27 21:43:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:43:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:13,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-27 21:43:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:43:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-27 21:43:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:43:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-27 21:43:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-27 21:43:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:43:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-27 21:43:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-27 21:43:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-27 21:43:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-27 21:43:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-27 21:43:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:43:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-08-27 21:43:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-27 21:43:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:43:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 39 proven. 22 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-08-27 21:43:14,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069766662] [2020-08-27 21:43:14,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:43:14,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-27 21:43:14,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796252624] [2020-08-27 21:43:14,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-27 21:43:14,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:43:14,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-27 21:43:14,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-08-27 21:43:14,209 INFO L87 Difference]: Start difference. First operand 513 states and 606 transitions. Second operand 14 states. [2020-08-27 21:43:14,691 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-27 21:43:15,406 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-27 21:43:16,475 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:43:16,828 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:43:17,141 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:43:17,437 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-27 21:43:17,773 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:43:18,073 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-27 21:43:19,590 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-27 21:43:19,922 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 188