/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product63.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:55:43,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:55:43,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:55:43,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:55:43,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:55:43,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:55:43,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:55:43,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:55:43,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:55:43,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:55:43,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:55:43,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:55:43,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:55:43,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:55:43,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:55:43,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:55:43,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:55:43,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:55:43,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:55:43,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:55:43,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:55:43,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:55:43,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:55:43,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:55:43,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 21:55:43,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 21:55:43,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 21:55:43,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 21:55:43,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 21:55:43,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 21:55:43,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 21:55:43,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 21:55:43,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 21:55:43,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 21:55:43,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 21:55:43,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 21:55:43,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 21:55:43,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 21:55:43,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:55:43,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:55:43,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:55:43,218 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 [2019-11-06 21:55:43,253 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:55:43,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:55:43,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:55:43,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:55:43,255 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:55:43,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:55:43,259 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:55:43,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:55:43,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:55:43,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:55:43,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:55:43,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:55:43,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:55:43,261 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:55:43,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:55:43,261 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:55:43,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:55:43,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:55:43,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:55:43,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:55:43,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:55:43,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:55:43,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:55:43,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:55:43,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:55:43,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:55:43,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:55:43,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:55:43,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:55:43,560 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:55:43,580 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:55:43,586 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:55:43,588 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:55:43,588 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:55:43,589 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product63.cil.c [2019-11-06 21:55:43,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/857a9e660/844bf6f889e04b7688da605c63035387/FLAG443d4c615 [2019-11-06 21:55:44,171 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:55:44,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec1_product63.cil.c [2019-11-06 21:55:44,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/857a9e660/844bf6f889e04b7688da605c63035387/FLAG443d4c615 [2019-11-06 21:55:44,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/857a9e660/844bf6f889e04b7688da605c63035387 [2019-11-06 21:55:44,491 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:55:44,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:55:44,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:55:44,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:55:44,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:55:44,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:55:44" (1/1) ... [2019-11-06 21:55:44,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329037be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:44, skipping insertion in model container [2019-11-06 21:55:44,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:55:44" (1/1) ... [2019-11-06 21:55:44,513 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:55:44,559 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:55:45,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:55:45,033 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:55:45,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:55:45,176 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:55:45,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:45 WrapperNode [2019-11-06 21:55:45,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:55:45,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:55:45,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:55:45,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:55:45,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:45" (1/1) ... [2019-11-06 21:55:45,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:45" (1/1) ... [2019-11-06 21:55:45,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:45" (1/1) ... [2019-11-06 21:55:45,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:45" (1/1) ... [2019-11-06 21:55:45,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:45" (1/1) ... [2019-11-06 21:55:45,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:45" (1/1) ... [2019-11-06 21:55:45,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:45" (1/1) ... [2019-11-06 21:55:45,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:55:45,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:55:45,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:55:45,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:55:45,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:45" (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 [2019-11-06 21:55:45,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:55:45,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:55:45,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-06 21:55:45,339 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-06 21:55:45,339 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-11-06 21:55:45,340 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-11-06 21:55:45,340 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2019-11-06 21:55:45,340 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-11-06 21:55:45,341 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2019-11-06 21:55:45,341 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-11-06 21:55:45,341 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-11-06 21:55:45,342 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-11-06 21:55:45,342 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-11-06 21:55:45,342 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-11-06 21:55:45,343 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-11-06 21:55:45,344 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-11-06 21:55:45,346 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2019-11-06 21:55:45,346 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-06 21:55:45,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-06 21:55:45,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-06 21:55:45,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-06 21:55:45,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-06 21:55:45,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-06 21:55:45,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-06 21:55:45,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-06 21:55:45,348 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-06 21:55:45,348 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-06 21:55:45,348 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-06 21:55:45,349 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-06 21:55:45,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:55:45,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-11-06 21:55:45,349 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-11-06 21:55:45,349 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-11-06 21:55:45,349 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-11-06 21:55:45,349 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-11-06 21:55:45,350 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-11-06 21:55:45,350 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-11-06 21:55:45,350 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-11-06 21:55:45,350 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-11-06 21:55:45,350 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-06 21:55:45,350 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-06 21:55:45,351 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-06 21:55:45,351 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-06 21:55:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:55:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:55:45,351 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-06 21:55:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-11-06 21:55:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-11-06 21:55:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-11-06 21:55:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-11-06 21:55:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-11-06 21:55:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-06 21:55:45,352 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-11-06 21:55:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-11-06 21:55:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-11-06 21:55:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-11-06 21:55:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2019-11-06 21:55:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-11-06 21:55:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-11-06 21:55:45,353 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-11-06 21:55:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-11-06 21:55:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-11-06 21:55:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-11-06 21:55:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2019-11-06 21:55:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-11-06 21:55:45,354 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2019-11-06 21:55:45,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 21:55:45,355 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-11-06 21:55:45,355 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-11-06 21:55:45,355 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-06 21:55:45,356 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-06 21:55:45,356 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-06 21:55:45,356 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-06 21:55:45,356 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 21:55:45,357 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-06 21:55:45,357 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-06 21:55:45,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 21:55:45,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-06 21:55:45,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 21:55:45,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-06 21:55:45,358 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-06 21:55:45,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:55:45,359 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-06 21:55:45,359 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-06 21:55:45,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 21:55:45,359 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-06 21:55:45,359 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-06 21:55:45,360 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-06 21:55:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-06 21:55:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-06 21:55:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-06 21:55:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-06 21:55:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-06 21:55:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-06 21:55:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:55:45,362 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-11-06 21:55:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-06 21:55:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:55:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-06 21:55:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:55:46,499 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:55:46,499 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-06 21:55:46,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:55:46 BoogieIcfgContainer [2019-11-06 21:55:46,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:55:46,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:55:46,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:55:46,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:55:46,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:55:44" (1/3) ... [2019-11-06 21:55:46,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f86b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:55:46, skipping insertion in model container [2019-11-06 21:55:46,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:45" (2/3) ... [2019-11-06 21:55:46,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f86b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:55:46, skipping insertion in model container [2019-11-06 21:55:46,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:55:46" (3/3) ... [2019-11-06 21:55:46,510 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product63.cil.c [2019-11-06 21:55:46,520 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:55:46,533 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:55:46,545 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:55:46,591 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:55:46,591 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:55:46,592 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:55:46,592 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:55:46,592 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:55:46,592 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:55:46,592 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:55:46,592 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:55:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2019-11-06 21:55:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 21:55:46,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:55:46,634 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:55:46,636 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:55:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:55:46,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1613581470, now seen corresponding path program 1 times [2019-11-06 21:55:46,654 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:55:46,654 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000940436] [2019-11-06 21:55:46,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:55:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:47,336 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-11-06 21:55:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:55:47,456 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000940436] [2019-11-06 21:55:47,457 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:55:47,457 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 21:55:47,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469582276] [2019-11-06 21:55:47,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 21:55:47,472 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:55:47,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 21:55:47,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:55:47,491 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 3 states. [2019-11-06 21:55:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:55:48,835 INFO L93 Difference]: Finished difference Result 359 states and 470 transitions. [2019-11-06 21:55:48,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:55:48,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2019-11-06 21:55:48,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:55:48,853 INFO L225 Difference]: With dead ends: 359 [2019-11-06 21:55:48,853 INFO L226 Difference]: Without dead ends: 194 [2019-11-06 21:55:48,858 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:55:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-11-06 21:55:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 156. [2019-11-06 21:55:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-06 21:55:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 187 transitions. [2019-11-06 21:55:48,993 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 187 transitions. Word has length 46 [2019-11-06 21:55:48,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:55:48,994 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 187 transitions. [2019-11-06 21:55:48,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 21:55:48,995 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 187 transitions. [2019-11-06 21:55:48,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 21:55:48,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:55:48,999 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:55:49,000 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:55:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:55:49,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1476283687, now seen corresponding path program 1 times [2019-11-06 21:55:49,000 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:55:49,001 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118439218] [2019-11-06 21:55:49,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:55:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:49,334 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-11-06 21:55:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:55:49,374 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118439218] [2019-11-06 21:55:49,375 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:55:49,375 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 21:55:49,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073007836] [2019-11-06 21:55:49,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:55:49,377 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:55:49,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:55:49,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:55:49,378 INFO L87 Difference]: Start difference. First operand 156 states and 187 transitions. Second operand 4 states. [2019-11-06 21:55:49,884 WARN L191 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:55:51,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:55:51,026 INFO L93 Difference]: Finished difference Result 286 states and 353 transitions. [2019-11-06 21:55:51,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:55:51,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-11-06 21:55:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:55:51,032 INFO L225 Difference]: With dead ends: 286 [2019-11-06 21:55:51,032 INFO L226 Difference]: Without dead ends: 178 [2019-11-06 21:55:51,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:55:51,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-11-06 21:55:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 147. [2019-11-06 21:55:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-11-06 21:55:51,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 175 transitions. [2019-11-06 21:55:51,100 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 175 transitions. Word has length 47 [2019-11-06 21:55:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:55:51,102 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 175 transitions. [2019-11-06 21:55:51,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:55:51,102 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 175 transitions. [2019-11-06 21:55:51,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 21:55:51,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:55:51,113 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:55:51,113 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:55:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:55:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash 474549322, now seen corresponding path program 1 times [2019-11-06 21:55:51,114 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:55:51,114 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581652442] [2019-11-06 21:55:51,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:55:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:51,523 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-11-06 21:55:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:55:51,646 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581652442] [2019-11-06 21:55:51,646 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:55:51,646 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 21:55:51,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330345393] [2019-11-06 21:55:51,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:55:51,648 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:55:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:55:51,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:55:51,649 INFO L87 Difference]: Start difference. First operand 147 states and 175 transitions. Second operand 8 states. [2019-11-06 21:55:52,232 WARN L191 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-11-06 21:55:52,576 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-06 21:55:52,857 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-11-06 21:55:53,125 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-11-06 21:55:53,978 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:55:56,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:55:56,535 INFO L93 Difference]: Finished difference Result 501 states and 627 transitions. [2019-11-06 21:55:56,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:55:56,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-11-06 21:55:56,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:55:56,541 INFO L225 Difference]: With dead ends: 501 [2019-11-06 21:55:56,541 INFO L226 Difference]: Without dead ends: 378 [2019-11-06 21:55:56,542 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:55:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2019-11-06 21:55:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 312. [2019-11-06 21:55:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2019-11-06 21:55:56,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 382 transitions. [2019-11-06 21:55:56,635 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 382 transitions. Word has length 51 [2019-11-06 21:55:56,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:55:56,636 INFO L462 AbstractCegarLoop]: Abstraction has 312 states and 382 transitions. [2019-11-06 21:55:56,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:55:56,636 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 382 transitions. [2019-11-06 21:55:56,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 21:55:56,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:55:56,638 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:55:56,638 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:55:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:55:56,642 INFO L82 PathProgramCache]: Analyzing trace with hash 912243430, now seen corresponding path program 1 times [2019-11-06 21:55:56,645 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:55:56,646 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237695231] [2019-11-06 21:55:56,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:55:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:56,939 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-11-06 21:55:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:55:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:55:57,033 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237695231] [2019-11-06 21:55:57,033 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:55:57,034 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 21:55:57,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590122733] [2019-11-06 21:55:57,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:55:57,035 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:55:57,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:55:57,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:55:57,035 INFO L87 Difference]: Start difference. First operand 312 states and 382 transitions. Second operand 8 states. [2019-11-06 21:55:57,470 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-11-06 21:55:58,388 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-11-06 21:55:58,886 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-11-06 21:55:59,269 WARN L191 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-11-06 21:55:59,570 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-11-06 21:56:00,280 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:56:01,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:56:01,614 INFO L93 Difference]: Finished difference Result 1010 states and 1311 transitions. [2019-11-06 21:56:01,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 21:56:01,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2019-11-06 21:56:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:56:01,620 INFO L225 Difference]: With dead ends: 1010 [2019-11-06 21:56:01,620 INFO L226 Difference]: Without dead ends: 722 [2019-11-06 21:56:01,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:56:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2019-11-06 21:56:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 579. [2019-11-06 21:56:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2019-11-06 21:56:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 714 transitions. [2019-11-06 21:56:01,754 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 714 transitions. Word has length 57 [2019-11-06 21:56:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:56:01,755 INFO L462 AbstractCegarLoop]: Abstraction has 579 states and 714 transitions. [2019-11-06 21:56:01,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:56:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 714 transitions. [2019-11-06 21:56:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 21:56:01,758 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:56:01,758 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:56:01,758 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:56:01,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:56:01,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1983295510, now seen corresponding path program 1 times [2019-11-06 21:56:01,759 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:56:01,759 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748743628] [2019-11-06 21:56:01,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:56:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:02,044 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-11-06 21:56:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:56:02,106 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748743628] [2019-11-06 21:56:02,106 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:56:02,106 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 21:56:02,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369669666] [2019-11-06 21:56:02,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:56:02,107 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:56:02,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:56:02,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:56:02,108 INFO L87 Difference]: Start difference. First operand 579 states and 714 transitions. Second operand 9 states. [2019-11-06 21:56:02,631 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-11-06 21:56:03,671 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-11-06 21:56:03,967 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-11-06 21:56:04,276 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-11-06 21:56:05,061 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-11-06 21:56:05,389 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:56:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:56:06,684 INFO L93 Difference]: Finished difference Result 1607 states and 2148 transitions. [2019-11-06 21:56:06,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 21:56:06,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2019-11-06 21:56:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:56:06,696 INFO L225 Difference]: With dead ends: 1607 [2019-11-06 21:56:06,696 INFO L226 Difference]: Without dead ends: 1052 [2019-11-06 21:56:06,699 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-11-06 21:56:06,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2019-11-06 21:56:06,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 871. [2019-11-06 21:56:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2019-11-06 21:56:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1071 transitions. [2019-11-06 21:56:06,866 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1071 transitions. Word has length 61 [2019-11-06 21:56:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:56:06,867 INFO L462 AbstractCegarLoop]: Abstraction has 871 states and 1071 transitions. [2019-11-06 21:56:06,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:56:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1071 transitions. [2019-11-06 21:56:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-06 21:56:06,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:56:06,870 INFO L410 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] [2019-11-06 21:56:06,870 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:56:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:56:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash -575696431, now seen corresponding path program 1 times [2019-11-06 21:56:06,871 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:56:06,871 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284191153] [2019-11-06 21:56:06,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:56:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,195 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-11-06 21:56:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 21:56:07,410 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284191153] [2019-11-06 21:56:07,411 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:56:07,411 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 21:56:07,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483456394] [2019-11-06 21:56:07,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:56:07,412 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:56:07,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:56:07,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:56:07,413 INFO L87 Difference]: Start difference. First operand 871 states and 1071 transitions. Second operand 9 states. [2019-11-06 21:56:08,605 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-11-06 21:56:08,890 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-11-06 21:56:09,188 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:56:09,467 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:56:10,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:56:10,877 INFO L93 Difference]: Finished difference Result 1983 states and 2672 transitions. [2019-11-06 21:56:10,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:56:10,878 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 103 [2019-11-06 21:56:10,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:56:10,885 INFO L225 Difference]: With dead ends: 1983 [2019-11-06 21:56:10,886 INFO L226 Difference]: Without dead ends: 1136 [2019-11-06 21:56:10,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:56:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2019-11-06 21:56:11,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 897. [2019-11-06 21:56:11,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2019-11-06 21:56:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1099 transitions. [2019-11-06 21:56:11,048 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1099 transitions. Word has length 103 [2019-11-06 21:56:11,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:56:11,048 INFO L462 AbstractCegarLoop]: Abstraction has 897 states and 1099 transitions. [2019-11-06 21:56:11,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:56:11,048 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1099 transitions. [2019-11-06 21:56:11,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-06 21:56:11,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:56:11,053 INFO L410 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] [2019-11-06 21:56:11,053 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:56:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:56:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash -928784813, now seen corresponding path program 1 times [2019-11-06 21:56:11,054 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:56:11,054 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823194245] [2019-11-06 21:56:11,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:56:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,326 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-11-06 21:56:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 21:56:11,486 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823194245] [2019-11-06 21:56:11,487 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:56:11,487 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-11-06 21:56:11,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486590715] [2019-11-06 21:56:11,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:56:11,488 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:56:11,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:56:11,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:56:11,489 INFO L87 Difference]: Start difference. First operand 897 states and 1099 transitions. Second operand 11 states. [2019-11-06 21:56:12,128 WARN L191 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-11-06 21:56:12,386 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:56:12,632 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:56:13,480 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:56:13,811 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:56:14,106 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:56:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:56:15,896 INFO L93 Difference]: Finished difference Result 2029 states and 2720 transitions. [2019-11-06 21:56:15,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 21:56:15,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 103 [2019-11-06 21:56:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:56:15,905 INFO L225 Difference]: With dead ends: 2029 [2019-11-06 21:56:15,905 INFO L226 Difference]: Without dead ends: 1156 [2019-11-06 21:56:15,909 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:56:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2019-11-06 21:56:16,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 913. [2019-11-06 21:56:16,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2019-11-06 21:56:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1115 transitions. [2019-11-06 21:56:16,088 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1115 transitions. Word has length 103 [2019-11-06 21:56:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:56:16,089 INFO L462 AbstractCegarLoop]: Abstraction has 913 states and 1115 transitions. [2019-11-06 21:56:16,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:56:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1115 transitions. [2019-11-06 21:56:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-06 21:56:16,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:56:16,092 INFO L410 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] [2019-11-06 21:56:16,092 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:56:16,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:56:16,092 INFO L82 PathProgramCache]: Analyzing trace with hash 204405780, now seen corresponding path program 1 times [2019-11-06 21:56:16,096 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:56:16,097 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111360646] [2019-11-06 21:56:16,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:56:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,378 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-11-06 21:56:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 21:56:16,596 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111360646] [2019-11-06 21:56:16,597 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:56:16,597 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 21:56:16,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128649267] [2019-11-06 21:56:16,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:56:16,598 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:56:16,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:56:16,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:56:16,598 INFO L87 Difference]: Start difference. First operand 913 states and 1115 transitions. Second operand 7 states. [2019-11-06 21:56:17,073 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-11-06 21:56:17,617 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-11-06 21:56:20,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:56:20,532 INFO L93 Difference]: Finished difference Result 2958 states and 3993 transitions. [2019-11-06 21:56:20,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 21:56:20,533 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 103 [2019-11-06 21:56:20,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:56:20,547 INFO L225 Difference]: With dead ends: 2958 [2019-11-06 21:56:20,547 INFO L226 Difference]: Without dead ends: 2069 [2019-11-06 21:56:20,551 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:56:20,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2019-11-06 21:56:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1767. [2019-11-06 21:56:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1767 states. [2019-11-06 21:56:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 2181 transitions. [2019-11-06 21:56:20,988 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 2181 transitions. Word has length 103 [2019-11-06 21:56:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:56:20,989 INFO L462 AbstractCegarLoop]: Abstraction has 1767 states and 2181 transitions. [2019-11-06 21:56:20,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:56:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 2181 transitions. [2019-11-06 21:56:20,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 21:56:20,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:56:20,995 INFO L410 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] [2019-11-06 21:56:20,995 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:56:20,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:56:20,995 INFO L82 PathProgramCache]: Analyzing trace with hash -796699686, now seen corresponding path program 1 times [2019-11-06 21:56:20,996 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:56:20,996 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652027045] [2019-11-06 21:56:20,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:56:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,291 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-11-06 21:56:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:56:21,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652027045] [2019-11-06 21:56:21,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630527000] [2019-11-06 21:56:21,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:56:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:56:21,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 21:56:21,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:56:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:56:22,031 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:56:22,032 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [17] total 22 [2019-11-06 21:56:22,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451398091] [2019-11-06 21:56:22,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:56:22,033 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:56:22,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:56:22,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2019-11-06 21:56:22,034 INFO L87 Difference]: Start difference. First operand 1767 states and 2181 transitions. Second operand 8 states.