/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_spec5_product55.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:14:53,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:14:53,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:14:53,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:14:53,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:14:53,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:14:53,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:14:53,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:14:53,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:14:53,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:14:53,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:14:53,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:14:53,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:14:53,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:14:53,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:14:53,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:14:53,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:14:53,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:14:53,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:14:54,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:14:54,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:14:54,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:14:54,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:14:54,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:14:54,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:14:54,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:14:54,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:14:54,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:14:54,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:14:54,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:14:54,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:14:54,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:14:54,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:14:54,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:14:54,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:14:54,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:14:54,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:14:54,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:14:54,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:14:54,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:14:54,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:14:54,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:14:54,082 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:14:54,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:14:54,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:14:54,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:14:54,085 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:14:54,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:14:54,086 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:14:54,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:14:54,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:14:54,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:14:54,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:14:54,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:14:54,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:14:54,088 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:14:54,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:14:54,089 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:14:54,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:14:54,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:14:54,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:14:54,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:14:54,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:14:54,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:14:54,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:14:54,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:14:54,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:14:54,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:14:54,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:14:54,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:14:54,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:14:54,092 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 [2020-09-21 10:14:54,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:14:54,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:14:54,574 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:14:54,575 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:14:54,576 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:14:54,577 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec5_product55.cil.c [2020-09-21 10:14:54,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47fcb9b7c/fdb90a716d0e4842bf671a9dd44b6dc7/FLAGbf3de290a [2020-09-21 10:14:55,329 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:14:55,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec5_product55.cil.c [2020-09-21 10:14:55,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47fcb9b7c/fdb90a716d0e4842bf671a9dd44b6dc7/FLAGbf3de290a [2020-09-21 10:14:55,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47fcb9b7c/fdb90a716d0e4842bf671a9dd44b6dc7 [2020-09-21 10:14:55,577 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:14:55,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:14:55,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:14:55,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:14:55,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:14:55,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:14:55" (1/1) ... [2020-09-21 10:14:55,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b54cc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:55, skipping insertion in model container [2020-09-21 10:14:55,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:14:55" (1/1) ... [2020-09-21 10:14:55,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:14:55,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:14:56,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:14:56,165 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:14:56,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:14:56,299 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:14:56,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:56 WrapperNode [2020-09-21 10:14:56,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:14:56,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:14:56,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:14:56,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:14:56,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:56" (1/1) ... [2020-09-21 10:14:56,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:56" (1/1) ... [2020-09-21 10:14:56,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:56" (1/1) ... [2020-09-21 10:14:56,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:56" (1/1) ... [2020-09-21 10:14:56,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:56" (1/1) ... [2020-09-21 10:14:56,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:56" (1/1) ... [2020-09-21 10:14:56,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:56" (1/1) ... [2020-09-21 10:14:56,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:14:56,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:14:56,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:14:56,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:14:56,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:14:56,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:14:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:14:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-09-21 10:14:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-09-21 10:14:56,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-09-21 10:14:56,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-09-21 10:14:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-09-21 10:14:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-09-21 10:14:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-09-21 10:14:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-09-21 10:14:56,507 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-09-21 10:14:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-09-21 10:14:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-09-21 10:14:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:14:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-09-21 10:14:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-09-21 10:14:56,510 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-09-21 10:14:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-09-21 10:14:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-09-21 10:14:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-09-21 10:14:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-09-21 10:14:56,511 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-09-21 10:14:56,512 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-09-21 10:14:56,512 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-09-21 10:14:56,512 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-09-21 10:14:56,513 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-09-21 10:14:56,513 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-09-21 10:14:56,514 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-09-21 10:14:56,514 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-09-21 10:14:56,514 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-09-21 10:14:56,514 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:14:56,515 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-09-21 10:14:56,515 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-09-21 10:14:56,515 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-09-21 10:14:56,515 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-09-21 10:14:56,515 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-09-21 10:14:56,516 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-09-21 10:14:56,516 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-09-21 10:14:56,516 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-09-21 10:14:56,516 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-09-21 10:14:56,516 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-09-21 10:14:56,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__1 [2020-09-21 10:14:56,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__2 [2020-09-21 10:14:56,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__3 [2020-09-21 10:14:56,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:14:56,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:14:56,517 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-09-21 10:14:56,518 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-09-21 10:14:56,518 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:14:56,518 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:14:56,518 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-09-21 10:14:56,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:14:56,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:14:56,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:14:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:14:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-09-21 10:14:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:14:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-09-21 10:14:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-09-21 10:14:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:14:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-09-21 10:14:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-09-21 10:14:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:14:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-09-21 10:14:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-09-21 10:14:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-09-21 10:14:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-09-21 10:14:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-09-21 10:14:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-09-21 10:14:56,522 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-09-21 10:14:56,523 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-09-21 10:14:56,523 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__1 [2020-09-21 10:14:56,524 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-09-21 10:14:56,524 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-09-21 10:14:56,524 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-09-21 10:14:56,524 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-09-21 10:14:56,525 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-09-21 10:14:56,525 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:14:56,525 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-09-21 10:14:56,526 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-09-21 10:14:56,527 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-09-21 10:14:56,527 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-09-21 10:14:56,527 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-09-21 10:14:56,527 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-09-21 10:14:56,527 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-09-21 10:14:56,527 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-09-21 10:14:56,528 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-09-21 10:14:56,529 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-09-21 10:14:56,529 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-09-21 10:14:56,529 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-09-21 10:14:56,529 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__2 [2020-09-21 10:14:56,530 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__3 [2020-09-21 10:14:56,530 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-09-21 10:14:56,530 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-09-21 10:14:56,530 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-09-21 10:14:56,530 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-09-21 10:14:56,530 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-09-21 10:14:56,530 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-09-21 10:14:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-09-21 10:14:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:14:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 10:14:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:14:57,870 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:14:57,870 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-21 10:14:57,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:14:57 BoogieIcfgContainer [2020-09-21 10:14:57,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:14:57,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:14:57,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:14:57,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:14:57,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:14:55" (1/3) ... [2020-09-21 10:14:57,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3b71cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:14:57, skipping insertion in model container [2020-09-21 10:14:57,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:14:56" (2/3) ... [2020-09-21 10:14:57,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3b71cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:14:57, skipping insertion in model container [2020-09-21 10:14:57,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:14:57" (3/3) ... [2020-09-21 10:14:57,892 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product55.cil.c [2020-09-21 10:14:57,905 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:14:57,918 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:14:57,942 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:14:57,978 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:14:57,979 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:14:57,979 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:14:57,979 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:14:57,979 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:14:57,979 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:14:57,980 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:14:57,980 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:14:58,009 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states. [2020-09-21 10:14:58,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-21 10:14:58,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:14:58,023 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:14:58,024 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:14:58,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:14:58,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1039510468, now seen corresponding path program 1 times [2020-09-21 10:14:58,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:14:58,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716961231] [2020-09-21 10:14:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:14:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:58,738 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:14:58,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:58,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:14:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:58,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:14:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:58,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:14:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:58,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:14:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:58,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:14:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:58,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:14:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:58,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:14:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:58,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 10:14:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:58,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-21 10:14:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:14:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:14:58,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716961231] [2020-09-21 10:14:58,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:14:58,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:14:58,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101128785] [2020-09-21 10:14:58,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:14:58,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:14:58,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:14:58,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:14:58,970 INFO L87 Difference]: Start difference. First operand 205 states. Second operand 4 states. [2020-09-21 10:15:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:00,241 INFO L93 Difference]: Finished difference Result 356 states and 457 transitions. [2020-09-21 10:15:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:15:00,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-09-21 10:15:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:00,263 INFO L225 Difference]: With dead ends: 356 [2020-09-21 10:15:00,264 INFO L226 Difference]: Without dead ends: 195 [2020-09-21 10:15:00,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:15:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-21 10:15:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 162. [2020-09-21 10:15:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-21 10:15:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2020-09-21 10:15:00,414 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 59 [2020-09-21 10:15:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:00,415 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2020-09-21 10:15:00,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:15:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2020-09-21 10:15:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-21 10:15:00,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:00,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:00,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:15:00,426 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:00,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:00,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1700142027, now seen corresponding path program 1 times [2020-09-21 10:15:00,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:00,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202118383] [2020-09-21 10:15:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,834 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:00,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:15:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:15:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:15:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:00,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202118383] [2020-09-21 10:15:00,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:00,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:15:00,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177314497] [2020-09-21 10:15:00,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:15:00,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:00,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:15:00,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:15:00,943 INFO L87 Difference]: Start difference. First operand 162 states and 192 transitions. Second operand 5 states. [2020-09-21 10:15:01,428 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:02,652 INFO L93 Difference]: Finished difference Result 295 states and 361 transitions. [2020-09-21 10:15:02,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:15:02,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-09-21 10:15:02,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:02,656 INFO L225 Difference]: With dead ends: 295 [2020-09-21 10:15:02,656 INFO L226 Difference]: Without dead ends: 185 [2020-09-21 10:15:02,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:15:02,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-21 10:15:02,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 153. [2020-09-21 10:15:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-21 10:15:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 180 transitions. [2020-09-21 10:15:02,700 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 180 transitions. Word has length 60 [2020-09-21 10:15:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:02,701 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 180 transitions. [2020-09-21 10:15:02,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:15:02,701 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 180 transitions. [2020-09-21 10:15:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-21 10:15:02,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:02,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:02,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:15:02,704 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:02,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:02,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1740397712, now seen corresponding path program 1 times [2020-09-21 10:15:02,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:02,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769221142] [2020-09-21 10:15:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:03,112 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:03,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:03,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:03,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:03,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:03,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:03,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:03,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:15:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:03,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:03,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:15:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:03,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:15:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:03,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769221142] [2020-09-21 10:15:03,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:03,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:15:03,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769869553] [2020-09-21 10:15:03,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:15:03,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:03,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:15:03,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:15:03,253 INFO L87 Difference]: Start difference. First operand 153 states and 180 transitions. Second operand 9 states. [2020-09-21 10:15:03,711 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:04,123 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:04,440 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:04,792 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:05,806 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:08,271 INFO L93 Difference]: Finished difference Result 508 states and 630 transitions. [2020-09-21 10:15:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:15:08,272 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-09-21 10:15:08,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:08,277 INFO L225 Difference]: With dead ends: 508 [2020-09-21 10:15:08,277 INFO L226 Difference]: Without dead ends: 383 [2020-09-21 10:15:08,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:15:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-09-21 10:15:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 326. [2020-09-21 10:15:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-09-21 10:15:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 396 transitions. [2020-09-21 10:15:08,364 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 396 transitions. Word has length 64 [2020-09-21 10:15:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:08,365 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 396 transitions. [2020-09-21 10:15:08,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:15:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 396 transitions. [2020-09-21 10:15:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-21 10:15:08,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:08,367 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:08,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:15:08,368 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:08,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:08,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1889366184, now seen corresponding path program 1 times [2020-09-21 10:15:08,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:08,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495373752] [2020-09-21 10:15:08,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,765 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:08,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:15:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:15:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:15:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:15:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:15:08,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495373752] [2020-09-21 10:15:08,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:08,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:15:08,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291143436] [2020-09-21 10:15:08,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:15:08,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:08,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:15:08,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:15:08,929 INFO L87 Difference]: Start difference. First operand 326 states and 396 transitions. Second operand 9 states. [2020-09-21 10:15:09,325 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:10,122 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:11,166 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:11,552 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:11,936 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:12,267 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:13,356 INFO L93 Difference]: Finished difference Result 827 states and 1076 transitions. [2020-09-21 10:15:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:15:13,356 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-09-21 10:15:13,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:13,365 INFO L225 Difference]: With dead ends: 827 [2020-09-21 10:15:13,365 INFO L226 Difference]: Without dead ends: 529 [2020-09-21 10:15:13,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:15:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-09-21 10:15:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 465. [2020-09-21 10:15:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2020-09-21 10:15:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 561 transitions. [2020-09-21 10:15:13,506 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 561 transitions. Word has length 70 [2020-09-21 10:15:13,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:13,507 INFO L479 AbstractCegarLoop]: Abstraction has 465 states and 561 transitions. [2020-09-21 10:15:13,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:15:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 561 transitions. [2020-09-21 10:15:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-21 10:15:13,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:13,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:13,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:15:13,510 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:13,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1315837753, now seen corresponding path program 1 times [2020-09-21 10:15:13,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:13,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410538287] [2020-09-21 10:15:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:13,874 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:13,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:13,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:13,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:13,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:13,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:13,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:13,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:15:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:13,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:13,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:15:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:13,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:13,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:14,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:14,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:14,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:14,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-21 10:15:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:14,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-21 10:15:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:14,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410538287] [2020-09-21 10:15:14,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:14,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-21 10:15:14,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373587451] [2020-09-21 10:15:14,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:15:14,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:14,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:15:14,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:15:14,067 INFO L87 Difference]: Start difference. First operand 465 states and 561 transitions. Second operand 9 states. [2020-09-21 10:15:15,251 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:15,579 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:15:15,918 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:16,225 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:17,351 INFO L93 Difference]: Finished difference Result 988 states and 1255 transitions. [2020-09-21 10:15:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:15:17,352 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 97 [2020-09-21 10:15:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:17,357 INFO L225 Difference]: With dead ends: 988 [2020-09-21 10:15:17,357 INFO L226 Difference]: Without dead ends: 551 [2020-09-21 10:15:17,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:15:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2020-09-21 10:15:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 478. [2020-09-21 10:15:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-09-21 10:15:17,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 575 transitions. [2020-09-21 10:15:17,439 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 575 transitions. Word has length 97 [2020-09-21 10:15:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:17,439 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 575 transitions. [2020-09-21 10:15:17,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:15:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 575 transitions. [2020-09-21 10:15:17,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-21 10:15:17,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:17,442 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:17,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:15:17,442 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:17,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:17,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1243451195, now seen corresponding path program 1 times [2020-09-21 10:15:17,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:17,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660836198] [2020-09-21 10:15:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,815 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:17,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:15:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:15:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-21 10:15:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-21 10:15:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:17,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660836198] [2020-09-21 10:15:17,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:17,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 10:15:17,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819405112] [2020-09-21 10:15:17,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:15:17,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:17,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:15:17,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:15:17,995 INFO L87 Difference]: Start difference. First operand 478 states and 575 transitions. Second operand 11 states. [2020-09-21 10:15:18,447 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:18,748 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:19,033 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:19,967 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:20,310 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:20,643 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:21,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:21,842 INFO L93 Difference]: Finished difference Result 1015 states and 1308 transitions. [2020-09-21 10:15:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:15:21,843 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 97 [2020-09-21 10:15:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:21,849 INFO L225 Difference]: With dead ends: 1015 [2020-09-21 10:15:21,849 INFO L226 Difference]: Without dead ends: 565 [2020-09-21 10:15:21,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:15:21,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2020-09-21 10:15:21,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 486. [2020-09-21 10:15:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-09-21 10:15:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 583 transitions. [2020-09-21 10:15:21,978 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 583 transitions. Word has length 97 [2020-09-21 10:15:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:21,982 INFO L479 AbstractCegarLoop]: Abstraction has 486 states and 583 transitions. [2020-09-21 10:15:21,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:15:21,987 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 583 transitions. [2020-09-21 10:15:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-21 10:15:21,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:21,989 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:21,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:15:21,990 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:21,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:21,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1573216956, now seen corresponding path program 1 times [2020-09-21 10:15:21,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:21,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282399095] [2020-09-21 10:15:21,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,375 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:22,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:15:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:15:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-21 10:15:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-21 10:15:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:22,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282399095] [2020-09-21 10:15:22,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:22,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:15:22,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211621932] [2020-09-21 10:15:22,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:15:22,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:22,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:15:22,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:15:22,598 INFO L87 Difference]: Start difference. First operand 486 states and 583 transitions. Second operand 7 states. [2020-09-21 10:15:22,956 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:23,595 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:26,128 INFO L93 Difference]: Finished difference Result 1503 states and 1948 transitions. [2020-09-21 10:15:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:15:26,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-09-21 10:15:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:26,136 INFO L225 Difference]: With dead ends: 1503 [2020-09-21 10:15:26,137 INFO L226 Difference]: Without dead ends: 1045 [2020-09-21 10:15:26,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:15:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2020-09-21 10:15:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 971. [2020-09-21 10:15:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 971 states. [2020-09-21 10:15:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1183 transitions. [2020-09-21 10:15:26,310 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1183 transitions. Word has length 97 [2020-09-21 10:15:26,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:26,310 INFO L479 AbstractCegarLoop]: Abstraction has 971 states and 1183 transitions. [2020-09-21 10:15:26,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:15:26,311 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1183 transitions. [2020-09-21 10:15:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-21 10:15:26,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:26,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:26,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:15:26,315 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:26,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:26,315 INFO L82 PathProgramCache]: Analyzing trace with hash 164101122, now seen corresponding path program 1 times [2020-09-21 10:15:26,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:26,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44296903] [2020-09-21 10:15:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,773 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:26,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:15:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:15:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:15:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-21 10:15:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:26,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-21 10:15:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:15:27,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44296903] [2020-09-21 10:15:27,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:15:27,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-21 10:15:27,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886194243] [2020-09-21 10:15:27,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:15:27,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:27,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:15:27,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:15:27,007 INFO L87 Difference]: Start difference. First operand 971 states and 1183 transitions. Second operand 12 states. [2020-09-21 10:15:27,501 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:28,318 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:29,117 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:29,496 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:29,811 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:30,160 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:30,506 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:33,014 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:33,418 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:34,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:34,254 INFO L93 Difference]: Finished difference Result 2749 states and 3568 transitions. [2020-09-21 10:15:34,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 10:15:34,255 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-09-21 10:15:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:34,268 INFO L225 Difference]: With dead ends: 2749 [2020-09-21 10:15:34,268 INFO L226 Difference]: Without dead ends: 2004 [2020-09-21 10:15:34,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 10:15:34,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2020-09-21 10:15:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1704. [2020-09-21 10:15:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-09-21 10:15:34,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2058 transitions. [2020-09-21 10:15:34,681 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2058 transitions. Word has length 101 [2020-09-21 10:15:34,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:34,739 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2058 transitions. [2020-09-21 10:15:34,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:15:34,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2058 transitions. [2020-09-21 10:15:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-09-21 10:15:34,749 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:34,753 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:15:34,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:15:34,754 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:34,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:34,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1947078735, now seen corresponding path program 1 times [2020-09-21 10:15:34,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:34,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476256508] [2020-09-21 10:15:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,200 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:35,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:15:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:15:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:15:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:15:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-21 10:15:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-21 10:15:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-09-21 10:15:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:15:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 10:15:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-21 10:15:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-21 10:15:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-21 10:15:35,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476256508] [2020-09-21 10:15:35,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:15:35,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 10:15:35,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752191241] [2020-09-21 10:15:35,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 10:15:35,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:35,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 10:15:35,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:15:35,570 INFO L87 Difference]: Start difference. First operand 1704 states and 2058 transitions. Second operand 16 states. [2020-09-21 10:15:36,089 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:15:36,510 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-21 10:15:36,842 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-21 10:15:37,171 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-21 10:15:37,978 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-09-21 10:15:38,274 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:38,689 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-21 10:15:39,252 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-21 10:15:40,586 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:41,269 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-21 10:15:41,907 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 193 [2020-09-21 10:15:42,337 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:42,986 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:43,475 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:44,168 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-09-21 10:15:44,653 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-21 10:15:45,574 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 195 [2020-09-21 10:15:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:15:46,345 INFO L93 Difference]: Finished difference Result 3639 states and 4528 transitions. [2020-09-21 10:15:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-21 10:15:46,350 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 178 [2020-09-21 10:15:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:15:46,364 INFO L225 Difference]: With dead ends: 3639 [2020-09-21 10:15:46,365 INFO L226 Difference]: Without dead ends: 2149 [2020-09-21 10:15:46,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=682, Invalid=2740, Unknown=0, NotChecked=0, Total=3422 [2020-09-21 10:15:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2020-09-21 10:15:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1971. [2020-09-21 10:15:46,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1971 states. [2020-09-21 10:15:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2328 transitions. [2020-09-21 10:15:46,759 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2328 transitions. Word has length 178 [2020-09-21 10:15:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:15:46,760 INFO L479 AbstractCegarLoop]: Abstraction has 1971 states and 2328 transitions. [2020-09-21 10:15:46,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 10:15:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2328 transitions. [2020-09-21 10:15:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-09-21 10:15:46,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:15:46,770 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-09-21 10:15:46,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:15:46,770 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:15:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:15:46,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1357647421, now seen corresponding path program 1 times [2020-09-21 10:15:46,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:15:46,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717557408] [2020-09-21 10:15:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:15:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,188 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-21 10:15:47,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:15:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:15:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 10:15:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:15:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:15:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:15:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:15:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:15:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-21 10:15:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:15:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:15:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 10:15:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-21 10:15:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-09-21 10:15:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:15:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:15:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 10:15:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:15:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-09-21 10:15:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:15:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-09-21 10:15:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:15:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 10:15:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:15:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-09-21 10:15:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-09-21 10:15:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:15:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 76 proven. 31 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-09-21 10:15:47,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717557408] [2020-09-21 10:15:47,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:15:47,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 10:15:47,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279207327] [2020-09-21 10:15:47,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:15:47,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:15:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:15:47,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:15:47,727 INFO L87 Difference]: Start difference. First operand 1971 states and 2328 transitions. Second operand 15 states. [2020-09-21 10:15:49,497 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:50,004 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:50,382 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-21 10:15:50,713 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-21 10:15:50,948 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-21 10:15:52,266 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 192