java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec5_product48.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:07:35,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:07:35,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:07:35,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:07:35,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:07:35,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:07:35,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:07:35,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:07:35,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:07:35,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:07:35,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:07:35,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:07:35,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:07:35,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:07:35,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:07:35,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:07:35,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:07:35,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:07:35,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:07:35,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:07:35,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:07:35,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:07:35,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:07:35,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:07:35,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:07:35,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:07:35,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:07:35,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:07:35,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:07:35,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:07:35,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:07:35,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:07:35,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:07:35,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:07:35,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:07:35,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:07:35,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:07:35,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:07:35,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:07:35,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:07:35,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:07:35,170 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 13:07:35,192 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:07:35,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:07:35,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 13:07:35,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 13:07:35,195 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 13:07:35,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:07:35,195 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:07:35,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 13:07:35,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:07:35,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:07:35,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:07:35,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:07:35,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:07:35,198 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:07:35,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:07:35,198 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 13:07:35,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:07:35,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:07:35,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:07:35,199 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 13:07:35,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 13:07:35,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:07:35,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:07:35,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:07:35,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 13:07:35,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 13:07:35,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:07:35,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 13:07:35,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:07:35,249 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:07:35,265 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:07:35,270 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:07:35,272 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:07:35,272 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:07:35,273 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec5_product48.cil.c [2019-09-20 13:07:35,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5419004d8/7fc437531d694c8b99ec26883997d029/FLAGf73604b96 [2019-09-20 13:07:35,932 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:07:35,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec5_product48.cil.c [2019-09-20 13:07:35,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5419004d8/7fc437531d694c8b99ec26883997d029/FLAGf73604b96 [2019-09-20 13:07:36,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5419004d8/7fc437531d694c8b99ec26883997d029 [2019-09-20 13:07:36,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:07:36,221 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:07:36,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:07:36,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:07:36,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:07:36,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:07:36" (1/1) ... [2019-09-20 13:07:36,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d534b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:36, skipping insertion in model container [2019-09-20 13:07:36,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:07:36" (1/1) ... [2019-09-20 13:07:36,237 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:07:36,288 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:07:36,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:07:36,781 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:07:36,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:07:36,972 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:07:36,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:36 WrapperNode [2019-09-20 13:07:36,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:07:36,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:07:36,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:07:36,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:07:36,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:36" (1/1) ... [2019-09-20 13:07:36,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:36" (1/1) ... [2019-09-20 13:07:37,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:36" (1/1) ... [2019-09-20 13:07:37,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:36" (1/1) ... [2019-09-20 13:07:37,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:36" (1/1) ... [2019-09-20 13:07:37,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:36" (1/1) ... [2019-09-20 13:07:37,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:36" (1/1) ... [2019-09-20 13:07:37,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:07:37,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:07:37,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:07:37,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:07:37,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:36" (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 [2019-09-20 13:07:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:07:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:07:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-09-20 13:07:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-09-20 13:07:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-09-20 13:07:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-09-20 13:07:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-09-20 13:07:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-09-20 13:07:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-09-20 13:07:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-09-20 13:07:37,142 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-09-20 13:07:37,142 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-09-20 13:07:37,142 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-09-20 13:07:37,142 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2019-09-20 13:07:37,142 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-09-20 13:07:37,142 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2019-09-20 13:07:37,143 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-09-20 13:07:37,143 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-09-20 13:07:37,143 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-09-20 13:07:37,143 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-09-20 13:07:37,143 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-09-20 13:07:37,143 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-09-20 13:07:37,144 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2019-09-20 13:07:37,144 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2019-09-20 13:07:37,144 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-09-20 13:07:37,144 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-09-20 13:07:37,144 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-09-20 13:07:37,144 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-09-20 13:07:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-09-20 13:07:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-09-20 13:07:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-09-20 13:07:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-09-20 13:07:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-09-20 13:07:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-09-20 13:07:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-09-20 13:07:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:07:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__1 [2019-09-20 13:07:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__2 [2019-09-20 13:07:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__3 [2019-09-20 13:07:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-09-20 13:07:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-09-20 13:07:37,147 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-09-20 13:07:37,147 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-09-20 13:07:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:07:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:07:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-09-20 13:07:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-09-20 13:07:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-20 13:07:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-20 13:07:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-09-20 13:07:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-20 13:07:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-20 13:07:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:07:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-20 13:07:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-09-20 13:07:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:07:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-09-20 13:07:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-09-20 13:07:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:07:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-09-20 13:07:37,150 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-09-20 13:07:37,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:07:37,150 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-09-20 13:07:37,150 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-09-20 13:07:37,150 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-09-20 13:07:37,150 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-09-20 13:07:37,150 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2019-09-20 13:07:37,151 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2019-09-20 13:07:37,151 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-09-20 13:07:37,151 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-09-20 13:07:37,151 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-09-20 13:07:37,151 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-09-20 13:07:37,151 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-09-20 13:07:37,152 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-09-20 13:07:37,152 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-09-20 13:07:37,152 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-09-20 13:07:37,152 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-09-20 13:07:37,152 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-09-20 13:07:37,152 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-09-20 13:07:37,153 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__2 [2019-09-20 13:07:37,153 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__3 [2019-09-20 13:07:37,153 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-09-20 13:07:37,153 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-09-20 13:07:37,153 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-09-20 13:07:37,153 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2019-09-20 13:07:37,153 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-09-20 13:07:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2019-09-20 13:07:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-09-20 13:07:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-09-20 13:07:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-09-20 13:07:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__1 [2019-09-20 13:07:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-09-20 13:07:37,155 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-09-20 13:07:37,155 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-09-20 13:07:37,155 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-09-20 13:07:37,155 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:07:37,155 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-09-20 13:07:37,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:07:37,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-20 13:07:37,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:07:38,178 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:07:38,178 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-20 13:07:38,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:07:38 BoogieIcfgContainer [2019-09-20 13:07:38,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:07:38,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:07:38,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:07:38,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:07:38,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:07:36" (1/3) ... [2019-09-20 13:07:38,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b616260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:07:38, skipping insertion in model container [2019-09-20 13:07:38,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:36" (2/3) ... [2019-09-20 13:07:38,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b616260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:07:38, skipping insertion in model container [2019-09-20 13:07:38,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:07:38" (3/3) ... [2019-09-20 13:07:38,191 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product48.cil.c [2019-09-20 13:07:38,200 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:07:38,211 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:07:38,227 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:07:38,262 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 13:07:38,263 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:07:38,263 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 13:07:38,263 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:07:38,264 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:07:38,264 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:07:38,264 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:07:38,265 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:07:38,265 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:07:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states. [2019-09-20 13:07:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-20 13:07:38,300 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:38,301 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:38,303 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:38,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:38,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1391539258, now seen corresponding path program 1 times [2019-09-20 13:07:38,311 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:38,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:38,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:38,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:38,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:38,765 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:38,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:07:38,770 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:07:38,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:07:38,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:07:38,785 INFO L87 Difference]: Start difference. First operand 196 states. Second operand 2 states. [2019-09-20 13:07:38,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:38,830 INFO L93 Difference]: Finished difference Result 302 states and 373 transitions. [2019-09-20 13:07:38,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:07:38,832 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 59 [2019-09-20 13:07:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:38,845 INFO L225 Difference]: With dead ends: 302 [2019-09-20 13:07:38,846 INFO L226 Difference]: Without dead ends: 153 [2019-09-20 13:07:38,851 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:07:38,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-09-20 13:07:38,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2019-09-20 13:07:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-09-20 13:07:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 180 transitions. [2019-09-20 13:07:38,905 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 180 transitions. Word has length 59 [2019-09-20 13:07:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:38,905 INFO L475 AbstractCegarLoop]: Abstraction has 153 states and 180 transitions. [2019-09-20 13:07:38,905 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:07:38,906 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 180 transitions. [2019-09-20 13:07:38,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-20 13:07:38,910 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:38,911 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:38,911 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:38,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:38,912 INFO L82 PathProgramCache]: Analyzing trace with hash 404948371, now seen corresponding path program 1 times [2019-09-20 13:07:38,912 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:38,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:38,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:38,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:38,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:39,042 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:39,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:07:39,044 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:07:39,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:07:39,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:07:39,045 INFO L87 Difference]: Start difference. First operand 153 states and 180 transitions. Second operand 3 states. [2019-09-20 13:07:39,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:39,080 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2019-09-20 13:07:39,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:07:39,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2019-09-20 13:07:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:39,090 INFO L225 Difference]: With dead ends: 241 [2019-09-20 13:07:39,090 INFO L226 Difference]: Without dead ends: 144 [2019-09-20 13:07:39,092 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:07:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-09-20 13:07:39,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2019-09-20 13:07:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-09-20 13:07:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 168 transitions. [2019-09-20 13:07:39,123 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 168 transitions. Word has length 60 [2019-09-20 13:07:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:39,124 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 168 transitions. [2019-09-20 13:07:39,124 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:07:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 168 transitions. [2019-09-20 13:07:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-20 13:07:39,134 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:39,134 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:39,134 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:39,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:39,135 INFO L82 PathProgramCache]: Analyzing trace with hash 539093391, now seen corresponding path program 1 times [2019-09-20 13:07:39,135 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:39,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:39,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:39,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:39,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:39,375 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:39,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-20 13:07:39,377 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:07:39,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:07:39,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:07:39,378 INFO L87 Difference]: Start difference. First operand 144 states and 168 transitions. Second operand 7 states. [2019-09-20 13:07:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:39,960 INFO L93 Difference]: Finished difference Result 432 states and 524 transitions. [2019-09-20 13:07:39,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:07:39,961 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2019-09-20 13:07:39,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:39,970 INFO L225 Difference]: With dead ends: 432 [2019-09-20 13:07:39,970 INFO L226 Difference]: Without dead ends: 316 [2019-09-20 13:07:39,974 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-09-20 13:07:39,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2019-09-20 13:07:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 304. [2019-09-20 13:07:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2019-09-20 13:07:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 368 transitions. [2019-09-20 13:07:40,032 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 368 transitions. Word has length 65 [2019-09-20 13:07:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:40,033 INFO L475 AbstractCegarLoop]: Abstraction has 304 states and 368 transitions. [2019-09-20 13:07:40,033 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:07:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 368 transitions. [2019-09-20 13:07:40,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-20 13:07:40,037 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:40,038 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:40,038 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:40,038 INFO L82 PathProgramCache]: Analyzing trace with hash -652418830, now seen corresponding path program 1 times [2019-09-20 13:07:40,039 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:40,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:40,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:40,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:40,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 13:07:40,200 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:40,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-20 13:07:40,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:07:40,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:07:40,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:07:40,203 INFO L87 Difference]: Start difference. First operand 304 states and 368 transitions. Second operand 7 states. [2019-09-20 13:07:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:41,017 INFO L93 Difference]: Finished difference Result 784 states and 1010 transitions. [2019-09-20 13:07:41,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-20 13:07:41,018 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2019-09-20 13:07:41,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:41,023 INFO L225 Difference]: With dead ends: 784 [2019-09-20 13:07:41,024 INFO L226 Difference]: Without dead ends: 508 [2019-09-20 13:07:41,026 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:07:41,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2019-09-20 13:07:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 454. [2019-09-20 13:07:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2019-09-20 13:07:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 541 transitions. [2019-09-20 13:07:41,099 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 541 transitions. Word has length 70 [2019-09-20 13:07:41,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:41,100 INFO L475 AbstractCegarLoop]: Abstraction has 454 states and 541 transitions. [2019-09-20 13:07:41,100 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:07:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 541 transitions. [2019-09-20 13:07:41,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-20 13:07:41,102 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:41,102 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:41,103 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:41,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:41,103 INFO L82 PathProgramCache]: Analyzing trace with hash -918633805, now seen corresponding path program 1 times [2019-09-20 13:07:41,103 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:41,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:41,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:41,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:41,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:41,196 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:41,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:07:41,197 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:07:41,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:07:41,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:07:41,198 INFO L87 Difference]: Start difference. First operand 454 states and 541 transitions. Second operand 4 states. [2019-09-20 13:07:41,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:41,544 INFO L93 Difference]: Finished difference Result 1650 states and 2082 transitions. [2019-09-20 13:07:41,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:07:41,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2019-09-20 13:07:41,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:41,553 INFO L225 Difference]: With dead ends: 1650 [2019-09-20 13:07:41,553 INFO L226 Difference]: Without dead ends: 1224 [2019-09-20 13:07:41,556 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:07:41,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2019-09-20 13:07:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1198. [2019-09-20 13:07:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1198 states. [2019-09-20 13:07:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1479 transitions. [2019-09-20 13:07:41,636 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1479 transitions. Word has length 108 [2019-09-20 13:07:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:41,637 INFO L475 AbstractCegarLoop]: Abstraction has 1198 states and 1479 transitions. [2019-09-20 13:07:41,637 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:07:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1479 transitions. [2019-09-20 13:07:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-20 13:07:41,640 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:41,640 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:41,641 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:41,641 INFO L82 PathProgramCache]: Analyzing trace with hash -678093676, now seen corresponding path program 1 times [2019-09-20 13:07:41,641 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:41,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:41,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:41,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:41,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:41,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:41,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:07:41,718 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:07:41,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:07:41,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:07:41,719 INFO L87 Difference]: Start difference. First operand 1198 states and 1479 transitions. Second operand 6 states. [2019-09-20 13:07:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:41,802 INFO L93 Difference]: Finished difference Result 2410 states and 3092 transitions. [2019-09-20 13:07:41,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:07:41,803 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-09-20 13:07:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:41,811 INFO L225 Difference]: With dead ends: 2410 [2019-09-20 13:07:41,811 INFO L226 Difference]: Without dead ends: 1240 [2019-09-20 13:07:41,815 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:07:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2019-09-20 13:07:41,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1228. [2019-09-20 13:07:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2019-09-20 13:07:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1511 transitions. [2019-09-20 13:07:41,892 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1511 transitions. Word has length 108 [2019-09-20 13:07:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:41,893 INFO L475 AbstractCegarLoop]: Abstraction has 1228 states and 1511 transitions. [2019-09-20 13:07:41,893 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:07:41,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1511 transitions. [2019-09-20 13:07:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-20 13:07:41,896 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:41,897 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:41,897 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:41,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1250179026, now seen corresponding path program 1 times [2019-09-20 13:07:41,897 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:41,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:41,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:41,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:41,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:41,997 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:41,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-09-20 13:07:41,998 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 13:07:41,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 13:07:41,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:07:41,999 INFO L87 Difference]: Start difference. First operand 1228 states and 1511 transitions. Second operand 8 states. [2019-09-20 13:07:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:42,085 INFO L93 Difference]: Finished difference Result 2217 states and 2807 transitions. [2019-09-20 13:07:42,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:07:42,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 108 [2019-09-20 13:07:42,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:42,094 INFO L225 Difference]: With dead ends: 2217 [2019-09-20 13:07:42,094 INFO L226 Difference]: Without dead ends: 1017 [2019-09-20 13:07:42,101 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:07:42,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2019-09-20 13:07:42,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 1017. [2019-09-20 13:07:42,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1017 states. [2019-09-20 13:07:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1238 transitions. [2019-09-20 13:07:42,180 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1238 transitions. Word has length 108 [2019-09-20 13:07:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:42,180 INFO L475 AbstractCegarLoop]: Abstraction has 1017 states and 1238 transitions. [2019-09-20 13:07:42,180 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 13:07:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1238 transitions. [2019-09-20 13:07:42,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-20 13:07:42,184 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:42,185 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:42,185 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:42,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1890897259, now seen corresponding path program 1 times [2019-09-20 13:07:42,186 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:42,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:42,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:42,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:42,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:42,427 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:42,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-09-20 13:07:42,428 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 13:07:42,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 13:07:42,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:07:42,429 INFO L87 Difference]: Start difference. First operand 1017 states and 1238 transitions. Second operand 9 states. [2019-09-20 13:07:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:44,002 INFO L93 Difference]: Finished difference Result 2788 states and 3552 transitions. [2019-09-20 13:07:44,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-20 13:07:44,003 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 112 [2019-09-20 13:07:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:44,018 INFO L225 Difference]: With dead ends: 2788 [2019-09-20 13:07:44,018 INFO L226 Difference]: Without dead ends: 1985 [2019-09-20 13:07:44,022 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-09-20 13:07:44,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2019-09-20 13:07:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1752. [2019-09-20 13:07:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1752 states. [2019-09-20 13:07:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 2101 transitions. [2019-09-20 13:07:44,189 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 2101 transitions. Word has length 112 [2019-09-20 13:07:44,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:44,190 INFO L475 AbstractCegarLoop]: Abstraction has 1752 states and 2101 transitions. [2019-09-20 13:07:44,190 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 13:07:44,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 2101 transitions. [2019-09-20 13:07:44,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-09-20 13:07:44,193 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:44,194 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-20 13:07:44,194 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:44,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:44,194 INFO L82 PathProgramCache]: Analyzing trace with hash 828062466, now seen corresponding path program 1 times [2019-09-20 13:07:44,194 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:44,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:44,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:44,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:44,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-09-20 13:07:44,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:07:44,364 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:07:44,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:44,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-20 13:07:44,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:07:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 13:07:44,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:07:44,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2019-09-20 13:07:44,781 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-20 13:07:44,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-20 13:07:44,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-20 13:07:44,783 INFO L87 Difference]: Start difference. First operand 1752 states and 2101 transitions. Second operand 16 states. [2019-09-20 13:07:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:46,222 INFO L93 Difference]: Finished difference Result 4015 states and 5018 transitions. [2019-09-20 13:07:46,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-20 13:07:46,222 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 172 [2019-09-20 13:07:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:46,237 INFO L225 Difference]: With dead ends: 4015 [2019-09-20 13:07:46,237 INFO L226 Difference]: Without dead ends: 2471 [2019-09-20 13:07:46,244 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2019-09-20 13:07:46,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-09-20 13:07:46,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2209. [2019-09-20 13:07:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2209 states. [2019-09-20 13:07:46,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 2619 transitions. [2019-09-20 13:07:46,377 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 2619 transitions. Word has length 172 [2019-09-20 13:07:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:46,378 INFO L475 AbstractCegarLoop]: Abstraction has 2209 states and 2619 transitions. [2019-09-20 13:07:46,378 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-20 13:07:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 2619 transitions. [2019-09-20 13:07:46,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-09-20 13:07:46,389 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:46,390 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:46,390 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:46,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1205235534, now seen corresponding path program 1 times [2019-09-20 13:07:46,391 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:46,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:46,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:46,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:46,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 114 proven. 10 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2019-09-20 13:07:46,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:07:46,719 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:07:46,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:47,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 1409 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-20 13:07:47,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:07:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 292 proven. 4 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 13:07:47,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:07:47,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2019-09-20 13:07:47,462 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-20 13:07:47,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-20 13:07:47,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2019-09-20 13:07:47,465 INFO L87 Difference]: Start difference. First operand 2209 states and 2619 transitions. Second operand 19 states. [2019-09-20 13:07:54,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:54,855 INFO L93 Difference]: Finished difference Result 8679 states and 12395 transitions. [2019-09-20 13:07:54,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-09-20 13:07:54,856 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 343 [2019-09-20 13:07:54,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:54,909 INFO L225 Difference]: With dead ends: 8679 [2019-09-20 13:07:54,909 INFO L226 Difference]: Without dead ends: 6506 [2019-09-20 13:07:54,925 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=679, Invalid=4577, Unknown=0, NotChecked=0, Total=5256 [2019-09-20 13:07:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6506 states. [2019-09-20 13:07:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6506 to 4579. [2019-09-20 13:07:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4579 states. [2019-09-20 13:07:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 5243 transitions. [2019-09-20 13:07:55,280 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 5243 transitions. Word has length 343 [2019-09-20 13:07:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:55,281 INFO L475 AbstractCegarLoop]: Abstraction has 4579 states and 5243 transitions. [2019-09-20 13:07:55,281 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-20 13:07:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 5243 transitions. [2019-09-20 13:07:55,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2019-09-20 13:07:55,307 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:55,308 INFO L407 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-20 13:07:55,308 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:55,309 INFO L82 PathProgramCache]: Analyzing trace with hash -91896701, now seen corresponding path program 1 times [2019-09-20 13:07:55,309 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:55,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:55,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:55,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:55,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 98 proven. 55 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2019-09-20 13:07:55,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:07:55,608 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:07:55,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:55,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-20 13:07:55,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:07:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 269 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-09-20 13:07:56,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:07:56,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2019-09-20 13:07:56,083 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-20 13:07:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-20 13:07:56,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2019-09-20 13:07:56,084 INFO L87 Difference]: Start difference. First operand 4579 states and 5243 transitions. Second operand 20 states. [2019-09-20 13:07:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:58,217 INFO L93 Difference]: Finished difference Result 8728 states and 10056 transitions. [2019-09-20 13:07:58,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-20 13:07:58,218 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 323 [2019-09-20 13:07:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:58,246 INFO L225 Difference]: With dead ends: 8728 [2019-09-20 13:07:58,246 INFO L226 Difference]: Without dead ends: 4595 [2019-09-20 13:07:58,258 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2019-09-20 13:07:58,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4595 states. [2019-09-20 13:07:58,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4595 to 4583. [2019-09-20 13:07:58,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4583 states. [2019-09-20 13:07:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 5237 transitions. [2019-09-20 13:07:58,531 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 5237 transitions. Word has length 323 [2019-09-20 13:07:58,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:58,534 INFO L475 AbstractCegarLoop]: Abstraction has 4583 states and 5237 transitions. [2019-09-20 13:07:58,534 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-20 13:07:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 5237 transitions. [2019-09-20 13:07:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-09-20 13:07:58,555 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:58,556 INFO L407 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-20 13:07:58,556 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1384694224, now seen corresponding path program 1 times [2019-09-20 13:07:58,557 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:58,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:58,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:58,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:58,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2019-09-20 13:07:58,787 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:58,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2019-09-20 13:07:58,787 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-20 13:07:58,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-20 13:07:58,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:07:58,788 INFO L87 Difference]: Start difference. First operand 4583 states and 5237 transitions. Second operand 13 states. [2019-09-20 13:08:00,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:00,109 INFO L93 Difference]: Finished difference Result 8524 states and 9811 transitions. [2019-09-20 13:08:00,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-20 13:08:00,109 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 324 [2019-09-20 13:08:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:00,132 INFO L225 Difference]: With dead ends: 8524 [2019-09-20 13:08:00,132 INFO L226 Difference]: Without dead ends: 4387 [2019-09-20 13:08:00,143 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2019-09-20 13:08:00,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2019-09-20 13:08:00,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 4335. [2019-09-20 13:08:00,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4335 states. [2019-09-20 13:08:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4335 states to 4335 states and 4932 transitions. [2019-09-20 13:08:00,353 INFO L78 Accepts]: Start accepts. Automaton has 4335 states and 4932 transitions. Word has length 324 [2019-09-20 13:08:00,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:00,356 INFO L475 AbstractCegarLoop]: Abstraction has 4335 states and 4932 transitions. [2019-09-20 13:08:00,356 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-20 13:08:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4335 states and 4932 transitions. [2019-09-20 13:08:00,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2019-09-20 13:08:00,371 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:00,371 INFO L407 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-20 13:08:00,371 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:00,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:00,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1506882070, now seen corresponding path program 1 times [2019-09-20 13:08:00,372 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:00,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:00,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:00,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:00,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-09-20 13:08:00,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:08:00,689 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:08:00,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:00,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 1363 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-20 13:08:00,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:08:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 197 proven. 16 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-09-20 13:08:01,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:08:01,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 14 [2019-09-20 13:08:01,165 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-20 13:08:01,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-20 13:08:01,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-09-20 13:08:01,167 INFO L87 Difference]: Start difference. First operand 4335 states and 4932 transitions. Second operand 14 states. [2019-09-20 13:08:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:03,979 INFO L93 Difference]: Finished difference Result 9800 states and 12218 transitions. [2019-09-20 13:08:03,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-20 13:08:03,979 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 328 [2019-09-20 13:08:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:04,023 INFO L225 Difference]: With dead ends: 9800 [2019-09-20 13:08:04,024 INFO L226 Difference]: Without dead ends: 7223 [2019-09-20 13:08:04,036 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 347 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2019-09-20 13:08:04,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7223 states. [2019-09-20 13:08:04,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7223 to 5435. [2019-09-20 13:08:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5435 states. [2019-09-20 13:08:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5435 states to 5435 states and 6191 transitions. [2019-09-20 13:08:04,415 INFO L78 Accepts]: Start accepts. Automaton has 5435 states and 6191 transitions. Word has length 328 [2019-09-20 13:08:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:04,416 INFO L475 AbstractCegarLoop]: Abstraction has 5435 states and 6191 transitions. [2019-09-20 13:08:04,416 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-20 13:08:04,416 INFO L276 IsEmpty]: Start isEmpty. Operand 5435 states and 6191 transitions. [2019-09-20 13:08:04,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2019-09-20 13:08:04,436 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:04,437 INFO L407 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-20 13:08:04,437 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:04,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2007408126, now seen corresponding path program 1 times [2019-09-20 13:08:04,438 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:04,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:04,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:04,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:04,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2019-09-20 13:08:04,618 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:08:04,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:08:04,619 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:08:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:08:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:08:04,621 INFO L87 Difference]: Start difference. First operand 5435 states and 6191 transitions. Second operand 3 states. [2019-09-20 13:08:04,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:04,900 INFO L93 Difference]: Finished difference Result 8889 states and 10157 transitions. [2019-09-20 13:08:04,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:08:04,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 375 [2019-09-20 13:08:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:04,938 INFO L225 Difference]: With dead ends: 8889 [2019-09-20 13:08:04,938 INFO L226 Difference]: Without dead ends: 3540 [2019-09-20 13:08:04,957 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:08:04,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3540 states. [2019-09-20 13:08:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3540 to 3450. [2019-09-20 13:08:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3450 states. [2019-09-20 13:08:05,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 3871 transitions. [2019-09-20 13:08:05,192 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 3871 transitions. Word has length 375 [2019-09-20 13:08:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:05,193 INFO L475 AbstractCegarLoop]: Abstraction has 3450 states and 3871 transitions. [2019-09-20 13:08:05,193 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:08:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 3871 transitions. [2019-09-20 13:08:05,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2019-09-20 13:08:05,204 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:05,204 INFO L407 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-20 13:08:05,205 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:05,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:05,205 INFO L82 PathProgramCache]: Analyzing trace with hash -380711344, now seen corresponding path program 1 times [2019-09-20 13:08:05,205 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:05,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:05,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:05,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:05,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 153 proven. 8 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2019-09-20 13:08:05,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:08:05,577 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:08:05,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:05,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 1491 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-20 13:08:05,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:08:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 224 proven. 46 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2019-09-20 13:08:06,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:08:06,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2019-09-20 13:08:06,106 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-20 13:08:06,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-20 13:08:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2019-09-20 13:08:06,107 INFO L87 Difference]: Start difference. First operand 3450 states and 3871 transitions. Second operand 18 states.