/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product10.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 16:31:14,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 16:31:14,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 16:31:14,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 16:31:14,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 16:31:14,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 16:31:14,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 16:31:14,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 16:31:14,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 16:31:14,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 16:31:14,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 16:31:14,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 16:31:14,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 16:31:14,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 16:31:14,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 16:31:14,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 16:31:14,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 16:31:14,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 16:31:14,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 16:31:14,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 16:31:14,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 16:31:14,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 16:31:14,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 16:31:14,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 16:31:14,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 16:31:14,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 16:31:14,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 16:31:14,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 16:31:14,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 16:31:14,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 16:31:14,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 16:31:14,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 16:31:14,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 16:31:14,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 16:31:14,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 16:31:14,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 16:31:14,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 16:31:14,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 16:31:14,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 16:31:14,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 16:31:14,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 16:31:14,340 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 16:31:14,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 16:31:14,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 16:31:14,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 16:31:14,370 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 16:31:14,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 16:31:14,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 16:31:14,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 16:31:14,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 16:31:14,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 16:31:14,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 16:31:14,373 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 16:31:14,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 16:31:14,374 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 16:31:14,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 16:31:14,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 16:31:14,375 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 16:31:14,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 16:31:14,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 16:31:14,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 16:31:14,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 16:31:14,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 16:31:14,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 16:31:14,377 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 16:31:14,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 16:31:14,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 16:31:14,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 16:31:14,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 16:31:14,889 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 16:31:14,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product10.cil.c [2021-02-23 16:31:14,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0eca0a1/a8dce74a2b874a5382c615752946fd6f/FLAGb9f6ec78d [2021-02-23 16:31:15,653 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 16:31:15,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product10.cil.c [2021-02-23 16:31:15,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0eca0a1/a8dce74a2b874a5382c615752946fd6f/FLAGb9f6ec78d [2021-02-23 16:31:15,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0eca0a1/a8dce74a2b874a5382c615752946fd6f [2021-02-23 16:31:15,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 16:31:15,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 16:31:15,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 16:31:15,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 16:31:15,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 16:31:15,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:31:15" (1/1) ... [2021-02-23 16:31:15,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62537fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:31:15, skipping insertion in model container [2021-02-23 16:31:15,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:31:15" (1/1) ... [2021-02-23 16:31:16,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 16:31:16,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 16:31:16,422 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product10.cil.c[11394,11407] [2021-02-23 16:31:16,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 16:31:16,503 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 16:31:16,559 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product10.cil.c[11394,11407] [2021-02-23 16:31:16,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 16:31:16,626 INFO L208 MainTranslator]: Completed translation [2021-02-23 16:31:16,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:31:16 WrapperNode [2021-02-23 16:31:16,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 16:31:16,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 16:31:16,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 16:31:16,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 16:31:16,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:31:16" (1/1) ... [2021-02-23 16:31:16,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:31:16" (1/1) ... [2021-02-23 16:31:16,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:31:16" (1/1) ... [2021-02-23 16:31:16,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:31:16" (1/1) ... [2021-02-23 16:31:16,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:31:16" (1/1) ... [2021-02-23 16:31:16,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:31:16" (1/1) ... [2021-02-23 16:31:16,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:31:16" (1/1) ... [2021-02-23 16:31:16,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 16:31:16,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 16:31:16,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 16:31:16,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 16:31:16,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:31:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-02-23 16:31:16,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 16:31:16,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 16:31:16,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2021-02-23 16:31:16,901 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 16:31:16,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2021-02-23 16:31:16,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2021-02-23 16:31:16,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2021-02-23 16:31:16,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2021-02-23 16:31:16,903 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2021-02-23 16:31:16,903 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2021-02-23 16:31:16,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2021-02-23 16:31:16,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-02-23 16:31:16,904 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-02-23 16:31:16,904 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2021-02-23 16:31:16,905 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2021-02-23 16:31:16,905 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2021-02-23 16:31:16,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 16:31:16,905 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-02-23 16:31:16,907 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2021-02-23 16:31:16,907 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__base [2021-02-23 16:31:16,910 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2021-02-23 16:31:16,910 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2021-02-23 16:31:16,910 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2021-02-23 16:31:16,910 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2021-02-23 16:31:16,910 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2021-02-23 16:31:16,910 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2021-02-23 16:31:16,911 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2021-02-23 16:31:16,911 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2021-02-23 16:31:16,911 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2021-02-23 16:31:16,911 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2021-02-23 16:31:16,911 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2021-02-23 16:31:16,911 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2021-02-23 16:31:16,912 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2021-02-23 16:31:16,912 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-02-23 16:31:16,912 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2021-02-23 16:31:16,912 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2021-02-23 16:31:16,912 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2021-02-23 16:31:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 16:31:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 16:31:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 16:31:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 16:31:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 16:31:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2021-02-23 16:31:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-02-23 16:31:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2021-02-23 16:31:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2021-02-23 16:31:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2021-02-23 16:31:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 16:31:16,914 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 16:31:16,914 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2021-02-23 16:31:16,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 16:31:16,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 16:31:16,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 16:31:16,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 16:31:16,914 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2021-02-23 16:31:16,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 16:31:16,915 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2021-02-23 16:31:16,915 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2021-02-23 16:31:16,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 16:31:16,915 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2021-02-23 16:31:16,915 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2021-02-23 16:31:16,915 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2021-02-23 16:31:16,915 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-02-23 16:31:16,916 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-02-23 16:31:16,916 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2021-02-23 16:31:16,916 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2021-02-23 16:31:16,916 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2021-02-23 16:31:16,916 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2021-02-23 16:31:16,916 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2021-02-23 16:31:16,917 INFO L130 BoogieDeclarations]: Found specification of procedure test [2021-02-23 16:31:16,917 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2021-02-23 16:31:16,917 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2021-02-23 16:31:16,917 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2021-02-23 16:31:16,918 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2021-02-23 16:31:16,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 16:31:16,918 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2021-02-23 16:31:16,918 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2021-02-23 16:31:16,918 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2021-02-23 16:31:16,919 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2021-02-23 16:31:16,919 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2021-02-23 16:31:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2021-02-23 16:31:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2021-02-23 16:31:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__base [2021-02-23 16:31:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2021-02-23 16:31:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-02-23 16:31:16,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 16:31:16,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 16:31:16,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 16:31:18,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 16:31:18,244 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-02-23 16:31:18,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:31:18 BoogieIcfgContainer [2021-02-23 16:31:18,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 16:31:18,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 16:31:18,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 16:31:18,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 16:31:18,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:31:15" (1/3) ... [2021-02-23 16:31:18,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a36be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:31:18, skipping insertion in model container [2021-02-23 16:31:18,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:31:16" (2/3) ... [2021-02-23 16:31:18,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a36be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:31:18, skipping insertion in model container [2021-02-23 16:31:18,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:31:18" (3/3) ... [2021-02-23 16:31:18,258 INFO L111 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product10.cil.c [2021-02-23 16:31:18,265 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 16:31:18,271 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 16:31:18,292 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 16:31:18,318 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 16:31:18,319 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 16:31:18,319 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 16:31:18,319 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 16:31:18,319 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 16:31:18,319 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 16:31:18,320 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 16:31:18,320 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 16:31:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states. [2021-02-23 16:31:18,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-02-23 16:31:18,363 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 16:31:18,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 16:31:18,364 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 16:31:18,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 16:31:18,371 INFO L82 PathProgramCache]: Analyzing trace with hash -804458709, now seen corresponding path program 1 times [2021-02-23 16:31:18,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 16:31:18,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287239047] [2021-02-23 16:31:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 16:31:18,467 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 16:31:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:18,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:18,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:18,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:18,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:19,232 WARN L202 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-23 16:31:19,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 16:31:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:19,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:19,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:19,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-23 16:31:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:19,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:19,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:19,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 16:31:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:19,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:19,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:19,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-23 16:31:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:19,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:19,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:19,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-23 16:31:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:19,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:19,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:19,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-02-23 16:31:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:19,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:19,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:19,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-02-23 16:31:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:19,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:19,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 16:31:19,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287239047] [2021-02-23 16:31:19,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 16:31:19,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 16:31:19,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897460211] [2021-02-23 16:31:19,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 16:31:19,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 16:31:19,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 16:31:19,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 16:31:19,521 INFO L87 Difference]: Start difference. First operand 251 states. Second operand 3 states. [2021-02-23 16:31:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 16:31:20,897 INFO L93 Difference]: Finished difference Result 358 states and 430 transitions. [2021-02-23 16:31:20,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 16:31:20,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2021-02-23 16:31:20,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 16:31:20,916 INFO L225 Difference]: With dead ends: 358 [2021-02-23 16:31:20,917 INFO L226 Difference]: Without dead ends: 237 [2021-02-23 16:31:20,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 16:31:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-02-23 16:31:21,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 199. [2021-02-23 16:31:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-02-23 16:31:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 212 transitions. [2021-02-23 16:31:21,113 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 212 transitions. Word has length 147 [2021-02-23 16:31:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 16:31:21,118 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 212 transitions. [2021-02-23 16:31:21,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 16:31:21,118 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 212 transitions. [2021-02-23 16:31:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-02-23 16:31:21,136 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 16:31:21,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 16:31:21,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 16:31:21,140 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 16:31:21,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 16:31:21,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2084857258, now seen corresponding path program 1 times [2021-02-23 16:31:21,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 16:31:21,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054261577] [2021-02-23 16:31:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 16:31:21,149 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 16:31:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:21,291 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:21,292 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:21,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:21,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 16:31:21,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:21,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:21,704 WARN L202 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-23 16:31:21,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 16:31:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:21,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:21,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:21,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-23 16:31:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:21,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:21,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:21,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 16:31:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:21,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:21,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:21,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-23 16:31:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:21,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:21,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:21,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-23 16:31:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:21,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:21,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:21,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-02-23 16:31:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:21,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:21,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:21,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-02-23 16:31:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:21,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:21,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 16:31:21,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054261577] [2021-02-23 16:31:21,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 16:31:21,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 16:31:21,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741376718] [2021-02-23 16:31:21,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 16:31:21,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 16:31:21,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 16:31:21,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 16:31:21,823 INFO L87 Difference]: Start difference. First operand 199 states and 212 transitions. Second operand 4 states. [2021-02-23 16:31:22,703 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2021-02-23 16:31:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 16:31:23,418 INFO L93 Difference]: Finished difference Result 270 states and 300 transitions. [2021-02-23 16:31:23,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 16:31:23,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2021-02-23 16:31:23,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 16:31:23,431 INFO L225 Difference]: With dead ends: 270 [2021-02-23 16:31:23,431 INFO L226 Difference]: Without dead ends: 220 [2021-02-23 16:31:23,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 16:31:23,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-02-23 16:31:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 189. [2021-02-23 16:31:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-02-23 16:31:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 199 transitions. [2021-02-23 16:31:23,530 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 199 transitions. Word has length 148 [2021-02-23 16:31:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 16:31:23,531 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 199 transitions. [2021-02-23 16:31:23,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 16:31:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 199 transitions. [2021-02-23 16:31:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-02-23 16:31:23,533 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 16:31:23,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 16:31:23,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 16:31:23,534 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 16:31:23,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 16:31:23,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1575613923, now seen corresponding path program 1 times [2021-02-23 16:31:23,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 16:31:23,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041722779] [2021-02-23 16:31:23,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 16:31:23,540 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 16:31:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:23,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:23,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:23,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:23,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 16:31:23,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:23,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 16:31:23,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:23,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:23,658 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:23,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 16:31:23,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:23,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:23,994 WARN L202 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-23 16:31:23,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 16:31:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:24,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:24,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:24,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-23 16:31:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:24,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:24,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:24,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 16:31:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:24,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:24,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:24,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-23 16:31:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:24,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:24,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:24,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:24,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 16:31:24,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:24,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 16:31:24,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-23 16:31:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:24,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:24,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:24,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-02-23 16:31:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:24,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:24,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 16:31:24,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-02-23 16:31:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:24,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:24,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:24,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-02-23 16:31:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:24,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:24,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 16:31:24,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041722779] [2021-02-23 16:31:24,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 16:31:24,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 16:31:24,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705933595] [2021-02-23 16:31:24,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 16:31:24,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 16:31:24,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 16:31:24,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-23 16:31:24,204 INFO L87 Difference]: Start difference. First operand 189 states and 199 transitions. Second operand 10 states. [2021-02-23 16:31:24,919 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-02-23 16:31:25,366 WARN L202 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2021-02-23 16:31:25,739 WARN L202 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2021-02-23 16:31:26,153 WARN L202 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 16:31:26,557 WARN L202 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 16:31:26,935 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 16:31:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 16:31:28,181 INFO L93 Difference]: Finished difference Result 316 states and 362 transitions. [2021-02-23 16:31:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 16:31:28,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 161 [2021-02-23 16:31:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 16:31:28,186 INFO L225 Difference]: With dead ends: 316 [2021-02-23 16:31:28,186 INFO L226 Difference]: Without dead ends: 242 [2021-02-23 16:31:28,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-02-23 16:31:28,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-02-23 16:31:28,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 189. [2021-02-23 16:31:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-02-23 16:31:28,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 198 transitions. [2021-02-23 16:31:28,265 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 198 transitions. Word has length 161 [2021-02-23 16:31:28,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 16:31:28,266 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 198 transitions. [2021-02-23 16:31:28,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 16:31:28,266 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 198 transitions. [2021-02-23 16:31:28,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-02-23 16:31:28,268 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 16:31:28,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 16:31:28,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 16:31:28,269 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 16:31:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 16:31:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash 69916811, now seen corresponding path program 1 times [2021-02-23 16:31:28,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 16:31:28,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271682334] [2021-02-23 16:31:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 16:31:28,274 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 16:31:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:28,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 16:31:28,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 16:31:28,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 16:31:28,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 16:31:28,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 16:31:28,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 16:31:28,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 16:31:28,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 16:31:28,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 16:31:28,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 16:31:28,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:28,792 WARN L202 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-23 16:31:28,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 16:31:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:28,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,861 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:28,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 16:31:28,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-23 16:31:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:28,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:28,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 16:31:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:28,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:28,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-23 16:31:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:28,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:28,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 16:31:28,921 WARN L141 QuantifierPusher]: treesize reduction 22, result has 33.3 percent of original size [2021-02-23 16:31:28,922 WARN L147 QuantifierPusher]: treesize reduction 22, result has 33.3 percent of original size 11 [2021-02-23 16:31:28,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-23 16:31:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:28,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:28,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:28,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-02-23 16:31:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:29,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:29,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:29,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-02-23 16:31:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:29,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:29,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:29,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-02-23 16:31:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:29,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:29,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:29,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:29,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 16:31:29,058 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:29,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 16:31:29,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-02-23 16:31:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:29,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:29,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 16:31:29,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271682334] [2021-02-23 16:31:29,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 16:31:29,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 16:31:29,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751881884] [2021-02-23 16:31:29,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 16:31:29,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 16:31:29,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 16:31:29,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-23 16:31:29,146 INFO L87 Difference]: Start difference. First operand 189 states and 198 transitions. Second operand 14 states. [2021-02-23 16:31:29,827 WARN L202 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-02-23 16:31:30,319 WARN L202 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2021-02-23 16:31:30,712 WARN L202 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2021-02-23 16:31:31,136 WARN L202 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 16:31:31,532 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 16:31:31,916 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 16:31:32,799 WARN L202 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2021-02-23 16:31:33,738 WARN L202 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 16:31:34,121 WARN L202 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 16:31:34,532 WARN L202 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 16:31:34,932 WARN L202 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2021-02-23 16:31:35,321 WARN L202 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-02-23 16:31:35,708 WARN L202 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2021-02-23 16:31:36,117 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2021-02-23 16:31:36,505 WARN L202 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 16:31:36,894 WARN L202 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 16:31:37,320 WARN L202 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 16:31:37,799 WARN L202 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2021-02-23 16:31:38,195 WARN L202 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 16:31:38,633 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 16:31:39,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 16:31:39,706 INFO L93 Difference]: Finished difference Result 479 states and 573 transitions. [2021-02-23 16:31:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-23 16:31:39,707 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 164 [2021-02-23 16:31:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 16:31:39,712 INFO L225 Difference]: With dead ends: 479 [2021-02-23 16:31:39,713 INFO L226 Difference]: Without dead ends: 405 [2021-02-23 16:31:39,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=252, Invalid=1008, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 16:31:39,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-02-23 16:31:39,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 311. [2021-02-23 16:31:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2021-02-23 16:31:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 339 transitions. [2021-02-23 16:31:39,860 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 339 transitions. Word has length 164 [2021-02-23 16:31:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 16:31:39,861 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 339 transitions. [2021-02-23 16:31:39,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 16:31:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 339 transitions. [2021-02-23 16:31:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-02-23 16:31:39,863 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 16:31:39,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 16:31:39,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 16:31:39,864 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 16:31:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 16:31:39,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2054989522, now seen corresponding path program 1 times [2021-02-23 16:31:39,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 16:31:39,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767037192] [2021-02-23 16:31:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 16:31:39,869 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 16:31:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:39,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:39,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 16:31:39,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:39,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:40,258 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-23 16:31:40,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 16:31:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:40,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:40,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:40,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:40,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 16:31:40,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-23 16:31:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:40,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:40,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:40,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 16:31:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:40,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:40,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:40,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-23 16:31:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:40,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:40,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:40,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-23 16:31:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:40,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:40,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:40,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-02-23 16:31:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:40,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:40,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:40,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-02-23 16:31:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:40,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:40,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:40,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-02-23 16:31:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:40,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:40,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:40,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-02-23 16:31:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:40,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:40,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:40,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-02-23 16:31:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 16:31:40,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 16:31:40,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 16:31:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 16:31:40,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767037192] [2021-02-23 16:31:40,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 16:31:40,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 16:31:40,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314059924] [2021-02-23 16:31:40,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 16:31:40,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 16:31:40,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 16:31:40,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 16:31:40,430 INFO L87 Difference]: Start difference. First operand 311 states and 339 transitions. Second operand 6 states. [2021-02-23 16:31:41,103 WARN L202 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-02-23 16:31:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 16:31:42,105 INFO L93 Difference]: Finished difference Result 520 states and 604 transitions. [2021-02-23 16:31:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 16:31:42,107 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2021-02-23 16:31:42,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 16:31:42,111 INFO L225 Difference]: With dead ends: 520 [2021-02-23 16:31:42,111 INFO L226 Difference]: Without dead ends: 380 [2021-02-23 16:31:42,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-23 16:31:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-02-23 16:31:42,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 293. [2021-02-23 16:31:42,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2021-02-23 16:31:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 310 transitions. [2021-02-23 16:31:42,283 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 310 transitions. Word has length 169 [2021-02-23 16:31:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 16:31:42,284 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 310 transitions. [2021-02-23 16:31:42,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 16:31:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 310 transitions. [2021-02-23 16:31:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-02-23 16:31:42,287 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 16:31:42,288 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 16:31:42,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 16:31:42,289 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 16:31:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 16:31:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1048216975, now seen corresponding path program 1 times [2021-02-23 16:31:42,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 16:31:42,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290213513] [2021-02-23 16:31:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY