/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_product56.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:11:06,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:11:06,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:11:06,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 17:11:06,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 17:11:06,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 17:11:06,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 17:11:06,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 17:11:06,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 17:11:06,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 17:11:06,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 17:11:06,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 17:11:06,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:11:06,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:11:06,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:11:06,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:11:06,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:11:06,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:11:06,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:11:06,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:11:06,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:11:06,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:11:06,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:11:06,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:11:06,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 17:11:06,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 17:11:06,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 17:11:06,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 17:11:06,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 17:11:06,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 17:11:06,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 17:11:06,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 17:11:06,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 17:11:06,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 17:11:06,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 17:11:06,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 17:11:06,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 17:11:06,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 17:11:06,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:11:06,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:11:06,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:11:06,209 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 17:11:06,234 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:11:06,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:11:06,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:11:06,241 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:11:06,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:11:06,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:11:06,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:11:06,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:11:06,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:11:06,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:11:06,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:11:06,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:11:06,245 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:11:06,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:11:06,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:11:06,246 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:11:06,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:11:06,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:11:06,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:11:06,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:11:06,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:11:06,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:11:06,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:11:06,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:11:06,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:11:06,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:11:06,830 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:11:06,832 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:11:06,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2021-02-23 17:11:06,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75bf915e5/4b241bea8256447eb6296b682b7c331b/FLAGaa5000521 [2021-02-23 17:11:07,779 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:11:07,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2021-02-23 17:11:07,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75bf915e5/4b241bea8256447eb6296b682b7c331b/FLAGaa5000521 [2021-02-23 17:11:07,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75bf915e5/4b241bea8256447eb6296b682b7c331b [2021-02-23 17:11:07,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:11:08,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:11:08,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:11:08,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:11:08,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:11:08,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:11:07" (1/1) ... [2021-02-23 17:11:08,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54ea3391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:11:08, skipping insertion in model container [2021-02-23 17:11:08,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:11:07" (1/1) ... [2021-02-23 17:11:08,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:11:08,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:11:08,554 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_product56.cil.c[17014,17027] [2021-02-23 17:11:08,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:11:08,587 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:11:08,737 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_product56.cil.c[17014,17027] [2021-02-23 17:11:08,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:11:08,832 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:11:08,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:11:08 WrapperNode [2021-02-23 17:11:08,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:11:08,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:11:08,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:11:08,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:11:08,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:11:08" (1/1) ... [2021-02-23 17:11:08,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:11:08" (1/1) ... [2021-02-23 17:11:08,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:11:08" (1/1) ... [2021-02-23 17:11:08,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:11:08" (1/1) ... [2021-02-23 17:11:08,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:11:08" (1/1) ... [2021-02-23 17:11:09,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:11:08" (1/1) ... [2021-02-23 17:11:09,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:11:08" (1/1) ... [2021-02-23 17:11:09,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:11:09,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:11:09,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:11:09,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:11:09,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:11:08" (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 17:11:09,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:11:09,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:11:09,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2021-02-23 17:11:09,155 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:11:09,155 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-02-23 17:11:09,155 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2021-02-23 17:11:09,155 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2021-02-23 17:11:09,156 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2021-02-23 17:11:09,156 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2021-02-23 17:11:09,156 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2021-02-23 17:11:09,156 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2021-02-23 17:11:09,156 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2021-02-23 17:11:09,157 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2021-02-23 17:11:09,157 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2021-02-23 17:11:09,157 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2021-02-23 17:11:09,157 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2021-02-23 17:11:09,158 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2021-02-23 17:11:09,158 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2021-02-23 17:11:09,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2021-02-23 17:11:09,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2021-02-23 17:11:09,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2021-02-23 17:11:09,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2021-02-23 17:11:09,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2021-02-23 17:11:09,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2021-02-23 17:11:09,159 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2021-02-23 17:11:09,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2021-02-23 17:11:09,159 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-02-23 17:11:09,160 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2021-02-23 17:11:09,160 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2021-02-23 17:11:09,160 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2021-02-23 17:11:09,160 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:11:09,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-02-23 17:11:09,161 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2021-02-23 17:11:09,161 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2021-02-23 17:11:09,161 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2021-02-23 17:11:09,161 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2021-02-23 17:11:09,161 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2021-02-23 17:11:09,161 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2021-02-23 17:11:09,161 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2021-02-23 17:11:09,162 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2021-02-23 17:11:09,162 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-02-23 17:11:09,162 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2021-02-23 17:11:09,162 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2021-02-23 17:11:09,162 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2021-02-23 17:11:09,163 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:11:09,163 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:11:09,163 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:11:09,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:11:09,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:11:09,164 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2021-02-23 17:11:09,164 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2021-02-23 17:11:09,164 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2021-02-23 17:11:09,164 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2021-02-23 17:11:09,164 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2021-02-23 17:11:09,164 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2021-02-23 17:11:09,165 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-02-23 17:11:09,165 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2021-02-23 17:11:09,165 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2021-02-23 17:11:09,165 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2021-02-23 17:11:09,165 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2021-02-23 17:11:09,166 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2021-02-23 17:11:09,166 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2021-02-23 17:11:09,166 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2021-02-23 17:11:09,166 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2021-02-23 17:11:09,166 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2021-02-23 17:11:09,166 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2021-02-23 17:11:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2021-02-23 17:11:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2021-02-23 17:11:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2021-02-23 17:11:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2021-02-23 17:11:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 17:11:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 17:11:09,168 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2021-02-23 17:11:09,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 17:11:09,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 17:11:09,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:11:09,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 17:11:09,169 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2021-02-23 17:11:09,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:11:09,169 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2021-02-23 17:11:09,169 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2021-02-23 17:11:09,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:11:09,170 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2021-02-23 17:11:09,170 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2021-02-23 17:11:09,170 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2021-02-23 17:11:09,170 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2021-02-23 17:11:09,170 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2021-02-23 17:11:09,170 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-02-23 17:11:09,171 INFO L130 BoogieDeclarations]: Found specification of procedure test [2021-02-23 17:11:09,171 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-02-23 17:11:09,171 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2021-02-23 17:11:09,171 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2021-02-23 17:11:09,171 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2021-02-23 17:11:09,172 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2021-02-23 17:11:09,172 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2021-02-23 17:11:09,172 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2021-02-23 17:11:09,172 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2021-02-23 17:11:09,172 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:11:09,172 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-02-23 17:11:09,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:11:09,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:11:09,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:11:10,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:11:10,985 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-02-23 17:11:10,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:11:10 BoogieIcfgContainer [2021-02-23 17:11:10,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:11:10,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:11:10,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:11:10,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:11:10,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:11:07" (1/3) ... [2021-02-23 17:11:10,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf37f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:11:10, skipping insertion in model container [2021-02-23 17:11:10,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:11:08" (2/3) ... [2021-02-23 17:11:10,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf37f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:11:10, skipping insertion in model container [2021-02-23 17:11:11,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:11:10" (3/3) ... [2021-02-23 17:11:11,001 INFO L111 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product56.cil.c [2021-02-23 17:11:11,009 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:11:11,016 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:11:11,038 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:11:11,065 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:11:11,065 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:11:11,065 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:11:11,065 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:11:11,066 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:11:11,066 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:11:11,066 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:11:11,066 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:11:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states. [2021-02-23 17:11:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-02-23 17:11:11,117 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:11:11,119 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 17:11:11,119 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:11:11,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:11:11,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1111213291, now seen corresponding path program 1 times [2021-02-23 17:11:11,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:11:11,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416654095] [2021-02-23 17:11:11,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:11:11,241 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:11:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:11,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:11,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:11,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:11,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:12,185 WARN L202 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-23 17:11:12,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:11:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:12,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:12,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:12,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-23 17:11:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:12,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:12,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:12,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 17:11:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:12,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:12,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:12,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-23 17:11:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:12,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:12,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:12,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-23 17:11:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:12,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:12,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:12,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-02-23 17:11:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:12,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:12,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:12,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-02-23 17:11:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:12,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:12,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:12,427 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 17:11:12,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416654095] [2021-02-23 17:11:12,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:11:12,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 17:11:12,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851042071] [2021-02-23 17:11:12,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 17:11:12,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:11:12,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 17:11:12,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 17:11:12,467 INFO L87 Difference]: Start difference. First operand 353 states. Second operand 3 states. [2021-02-23 17:11:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:11:14,876 INFO L93 Difference]: Finished difference Result 570 states and 676 transitions. [2021-02-23 17:11:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 17:11:14,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2021-02-23 17:11:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:11:14,898 INFO L225 Difference]: With dead ends: 570 [2021-02-23 17:11:14,899 INFO L226 Difference]: Without dead ends: 347 [2021-02-23 17:11:14,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 17:11:14,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-02-23 17:11:15,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 301. [2021-02-23 17:11:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2021-02-23 17:11:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 329 transitions. [2021-02-23 17:11:15,185 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 329 transitions. Word has length 147 [2021-02-23 17:11:15,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:11:15,189 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 329 transitions. [2021-02-23 17:11:15,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 17:11:15,190 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 329 transitions. [2021-02-23 17:11:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-02-23 17:11:15,205 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:11:15,206 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 17:11:15,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:11:15,207 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:11:15,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:11:15,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1286588722, now seen corresponding path program 1 times [2021-02-23 17:11:15,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:11:15,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349759469] [2021-02-23 17:11:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:11:15,225 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:11:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:15,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:15,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:15,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:15,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:15,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:15,489 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:15,887 WARN L202 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-23 17:11:15,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:11:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:15,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:15,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:15,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-23 17:11:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:15,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:15,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:15,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 17:11:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:15,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:15,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:15,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-23 17:11:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:15,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:15,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:15,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-23 17:11:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:15,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:15,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:15,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-02-23 17:11:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:15,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:15,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:15,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-02-23 17:11:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:15,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:15,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:16,009 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 17:11:16,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349759469] [2021-02-23 17:11:16,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:11:16,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:11:16,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413794389] [2021-02-23 17:11:16,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:11:16,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:11:16,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:11:16,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:11:16,014 INFO L87 Difference]: Start difference. First operand 301 states and 329 transitions. Second operand 4 states. [2021-02-23 17:11:16,894 WARN L202 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2021-02-23 17:11:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:11:18,441 INFO L93 Difference]: Finished difference Result 476 states and 538 transitions. [2021-02-23 17:11:18,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 17:11:18,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2021-02-23 17:11:18,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:11:18,449 INFO L225 Difference]: With dead ends: 476 [2021-02-23 17:11:18,449 INFO L226 Difference]: Without dead ends: 330 [2021-02-23 17:11:18,453 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 17:11:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-02-23 17:11:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 291. [2021-02-23 17:11:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2021-02-23 17:11:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 316 transitions. [2021-02-23 17:11:18,577 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 316 transitions. Word has length 148 [2021-02-23 17:11:18,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:11:18,577 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 316 transitions. [2021-02-23 17:11:18,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:11:18,578 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 316 transitions. [2021-02-23 17:11:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-02-23 17:11:18,580 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:11:18,581 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 17:11:18,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:11:18,581 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:11:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:11:18,582 INFO L82 PathProgramCache]: Analyzing trace with hash -224005287, now seen corresponding path program 1 times [2021-02-23 17:11:18,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:11:18,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063249321] [2021-02-23 17:11:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:11:18,587 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:11:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:18,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:18,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:18,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:18,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:18,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:18,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:18,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:18,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:18,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:18,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:11:18,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:18,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:19,052 WARN L202 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-23 17:11:19,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:11:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:19,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:19,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:19,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-23 17:11:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:19,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:19,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:19,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 17:11:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:19,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:19,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:19,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-23 17:11:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:19,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:19,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:19,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:19,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:11:19,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:19,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:11:19,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-23 17:11:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:19,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:19,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:19,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-02-23 17:11:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:19,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:19,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:19,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-02-23 17:11:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:19,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:19,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:19,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-02-23 17:11:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:19,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:19,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:19,322 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 17:11:19,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063249321] [2021-02-23 17:11:19,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:11:19,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 17:11:19,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886999954] [2021-02-23 17:11:19,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 17:11:19,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:11:19,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 17:11:19,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:11:19,326 INFO L87 Difference]: Start difference. First operand 291 states and 316 transitions. Second operand 10 states. [2021-02-23 17:11:20,121 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-02-23 17:11:20,609 WARN L202 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2021-02-23 17:11:21,020 WARN L202 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2021-02-23 17:11:21,414 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 17:11:21,791 WARN L202 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 17:11:22,154 WARN L202 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 17:11:23,251 WARN L202 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2021-02-23 17:11:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:11:26,851 INFO L93 Difference]: Finished difference Result 802 states and 934 transitions. [2021-02-23 17:11:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 17:11:26,852 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 161 [2021-02-23 17:11:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:11:26,858 INFO L225 Difference]: With dead ends: 802 [2021-02-23 17:11:26,859 INFO L226 Difference]: Without dead ends: 626 [2021-02-23 17:11:26,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-02-23 17:11:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-02-23 17:11:27,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 527. [2021-02-23 17:11:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2021-02-23 17:11:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 591 transitions. [2021-02-23 17:11:27,146 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 591 transitions. Word has length 161 [2021-02-23 17:11:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:11:27,146 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 591 transitions. [2021-02-23 17:11:27,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 17:11:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 591 transitions. [2021-02-23 17:11:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-02-23 17:11:27,150 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:11:27,151 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] [2021-02-23 17:11:27,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:11:27,151 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:11:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:11:27,152 INFO L82 PathProgramCache]: Analyzing trace with hash -445219938, now seen corresponding path program 1 times [2021-02-23 17:11:27,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:11:27,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106676183] [2021-02-23 17:11:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:11:27,156 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:11:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:27,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:27,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:27,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:27,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:27,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:11:27,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:11:27,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:11:27,259 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,260 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:11:27,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:11:27,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:11:27,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:27,637 WARN L202 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-23 17:11:27,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:11:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:27,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:27,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 17:11:27,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-23 17:11:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:27,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:27,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 17:11:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:27,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:27,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-23 17:11:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:27,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:27,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:11:27,752 WARN L141 QuantifierPusher]: treesize reduction 22, result has 33.3 percent of original size [2021-02-23 17:11:27,755 WARN L147 QuantifierPusher]: treesize reduction 22, result has 33.3 percent of original size 11 [2021-02-23 17:11:27,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-23 17:11:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:27,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:27,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-02-23 17:11:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:27,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,801 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:27,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-02-23 17:11:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:27,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:27,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:27,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:27,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-02-23 17:11:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:27,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:27,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:27,900 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 17:11:27,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106676183] [2021-02-23 17:11:27,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:11:27,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 17:11:27,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406080635] [2021-02-23 17:11:27,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 17:11:27,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:11:27,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 17:11:27,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-23 17:11:27,904 INFO L87 Difference]: Start difference. First operand 527 states and 591 transitions. Second operand 14 states. [2021-02-23 17:11:28,650 WARN L202 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-02-23 17:11:29,189 WARN L202 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2021-02-23 17:11:29,601 WARN L202 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2021-02-23 17:11:30,031 WARN L202 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 17:11:30,461 WARN L202 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 17:11:30,873 WARN L202 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 17:11:31,732 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2021-02-23 17:11:33,200 WARN L202 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 17:11:33,761 WARN L202 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 17:11:34,387 WARN L202 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 17:11:34,915 WARN L202 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2021-02-23 17:11:35,402 WARN L202 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-02-23 17:11:35,808 WARN L202 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2021-02-23 17:11:36,225 WARN L202 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2021-02-23 17:11:36,721 WARN L202 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 17:11:37,114 WARN L202 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 17:11:37,731 WARN L202 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 17:11:38,476 WARN L202 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2021-02-23 17:11:39,065 WARN L202 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-23 17:11:39,681 WARN L202 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-23 17:11:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:11:42,914 INFO L93 Difference]: Finished difference Result 1861 states and 2326 transitions. [2021-02-23 17:11:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-23 17:11:42,916 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 166 [2021-02-23 17:11:42,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:11:42,928 INFO L225 Difference]: With dead ends: 1861 [2021-02-23 17:11:42,929 INFO L226 Difference]: Without dead ends: 1449 [2021-02-23 17:11:42,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=252, Invalid=1008, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 17:11:42,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-02-23 17:11:43,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1306. [2021-02-23 17:11:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1306 states. [2021-02-23 17:11:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1548 transitions. [2021-02-23 17:11:43,826 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1548 transitions. Word has length 166 [2021-02-23 17:11:43,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:11:43,827 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 1548 transitions. [2021-02-23 17:11:43,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 17:11:43,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1548 transitions. [2021-02-23 17:11:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-02-23 17:11:43,834 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:11:43,834 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, 1, 1] [2021-02-23 17:11:43,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:11:43,835 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:11:43,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:11:43,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1356226495, now seen corresponding path program 1 times [2021-02-23 17:11:43,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:11:43,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676620994] [2021-02-23 17:11:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:11:43,841 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:11:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:43,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:43,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:43,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:43,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:43,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:43,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:43,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:43,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:43,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:43,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:43,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:43,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:43,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:43,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:44,264 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-23 17:11:44,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:11:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:44,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:44,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:44,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:44,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:44,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-23 17:11:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:44,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:44,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:44,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 17:11:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:44,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:44,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:44,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-23 17:11:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:44,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:44,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:44,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-23 17:11:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:44,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:44,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:44,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-02-23 17:11:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:44,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:44,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:11:44,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-02-23 17:11:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:44,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:44,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:44,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-02-23 17:11:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:44,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:44,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:44,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-02-23 17:11:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:11:44,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:44,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:11:44,449 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 17:11:44,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676620994] [2021-02-23 17:11:44,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:11:44,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:11:44,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310308633] [2021-02-23 17:11:44,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:11:44,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:11:44,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:11:44,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:11:44,451 INFO L87 Difference]: Start difference. First operand 1306 states and 1548 transitions. Second operand 6 states. [2021-02-23 17:11:45,125 WARN L202 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-02-23 17:11:48,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:11:48,950 INFO L93 Difference]: Finished difference Result 2937 states and 3703 transitions. [2021-02-23 17:11:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 17:11:48,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 171 [2021-02-23 17:11:48,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:11:48,968 INFO L225 Difference]: With dead ends: 2937 [2021-02-23 17:11:48,968 INFO L226 Difference]: Without dead ends: 1746 [2021-02-23 17:11:48,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-23 17:11:48,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-02-23 17:11:49,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1619. [2021-02-23 17:11:49,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1619 states. [2021-02-23 17:11:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 1907 transitions. [2021-02-23 17:11:49,744 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 1907 transitions. Word has length 171 [2021-02-23 17:11:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:11:49,744 INFO L480 AbstractCegarLoop]: Abstraction has 1619 states and 1907 transitions. [2021-02-23 17:11:49,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:11:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 1907 transitions. [2021-02-23 17:11:49,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-02-23 17:11:49,751 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:11:49,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:11:49,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 17:11:49,752 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:11:49,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:11:49,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1603343306, now seen corresponding path program 1 times [2021-02-23 17:11:49,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:11:49,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507350394] [2021-02-23 17:11:49,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:11:50,473 WARN L202 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 117 [2021-02-23 17:11:50,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:11:50,494 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 281