/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_spec2_product55.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:58:57,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:58:57,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:58:57,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:58:57,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:58:57,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:58:57,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:58:57,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:58:57,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:58:57,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:58:57,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:58:57,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:58:57,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:58:57,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:58:57,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:58:57,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:58:57,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:58:57,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:58:57,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:58:57,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:58:57,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:58:57,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:58:57,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:58:57,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:58:57,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 21:58:57,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 21:58:57,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 21:58:57,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 21:58:57,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 21:58:57,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 21:58:57,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 21:58:57,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 21:58:57,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 21:58:57,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 21:58:57,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 21:58:57,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 21:58:57,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 21:58:57,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 21:58:57,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:58:57,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:58:57,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:58:57,199 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 21:58:57,213 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:58:57,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:58:57,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:58:57,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:58:57,215 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:58:57,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:58:57,216 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:58:57,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:58:57,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:58:57,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:58:57,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:58:57,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:58:57,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:58:57,217 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:58:57,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:58:57,217 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:58:57,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:58:57,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:58:57,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:58:57,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:58:57,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:58:57,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:58:57,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:58:57,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:58:57,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:58:57,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:58:57,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:58:57,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:58:57,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:58:57,499 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:58:57,513 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:58:57,516 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:58:57,518 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:58:57,518 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:58:57,519 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product55.cil.c [2019-11-06 21:58:57,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91d7fc08f/d1f2e2dd57064baf95f464e15e0a8d50/FLAG162395b1b [2019-11-06 21:58:58,155 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:58:58,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec2_product55.cil.c [2019-11-06 21:58:58,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91d7fc08f/d1f2e2dd57064baf95f464e15e0a8d50/FLAG162395b1b [2019-11-06 21:58:58,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91d7fc08f/d1f2e2dd57064baf95f464e15e0a8d50 [2019-11-06 21:58:58,447 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:58:58,448 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:58:58,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:58:58,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:58:58,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:58:58,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:58" (1/1) ... [2019-11-06 21:58:58,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53369a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:58, skipping insertion in model container [2019-11-06 21:58:58,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:58" (1/1) ... [2019-11-06 21:58:58,468 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:58:58,512 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:58:58,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:58:58,968 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:58:59,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:58:59,124 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:58:59,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:59 WrapperNode [2019-11-06 21:58:59,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:58:59,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:58:59,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:58:59,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:58:59,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:59" (1/1) ... [2019-11-06 21:58:59,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:59" (1/1) ... [2019-11-06 21:58:59,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:59" (1/1) ... [2019-11-06 21:58:59,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:59" (1/1) ... [2019-11-06 21:58:59,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:59" (1/1) ... [2019-11-06 21:58:59,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:59" (1/1) ... [2019-11-06 21:58:59,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:59" (1/1) ... [2019-11-06 21:58:59,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:58:59,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:58:59,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:58:59,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:58:59,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:59" (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 21:58:59,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:58:59,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:58:59,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-06 21:58:59,286 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-06 21:58:59,286 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-06 21:58:59,287 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-06 21:58:59,287 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-06 21:58:59,287 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-11-06 21:58:59,287 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-11-06 21:58:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-11-06 21:58:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-11-06 21:58:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-11-06 21:58:59,289 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-11-06 21:58:59,289 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-11-06 21:58:59,290 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-11-06 21:58:59,290 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-06 21:58:59,293 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-06 21:58:59,293 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-11-06 21:58:59,294 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-11-06 21:58:59,294 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2019-11-06 21:58:59,294 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-11-06 21:58:59,294 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-11-06 21:58:59,294 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-11-06 21:58:59,294 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-11-06 21:58:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-11-06 21:58:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-11-06 21:58:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-11-06 21:58:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-11-06 21:58:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2019-11-06 21:58:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-06 21:58:59,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-06 21:58:59,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-06 21:58:59,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-06 21:58:59,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-06 21:58:59,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-06 21:58:59,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2019-11-06 21:58:59,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2019-11-06 21:58:59,297 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-06 21:58:59,297 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-06 21:58:59,297 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-06 21:58:59,297 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-06 21:58:59,298 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:58:59,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-06 21:58:59,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:58:59,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:58:59,299 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-06 21:58:59,299 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-06 21:58:59,299 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-06 21:58:59,299 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-06 21:58:59,299 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-06 21:58:59,300 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-11-06 21:58:59,300 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-11-06 21:58:59,300 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-11-06 21:58:59,300 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-11-06 21:58:59,300 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-11-06 21:58:59,300 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-11-06 21:58:59,301 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-11-06 21:58:59,301 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-11-06 21:58:59,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 21:58:59,301 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2019-11-06 21:58:59,301 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-06 21:58:59,301 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-06 21:58:59,302 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-06 21:58:59,302 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-11-06 21:58:59,302 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-11-06 21:58:59,302 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-11-06 21:58:59,302 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-11-06 21:58:59,303 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2019-11-06 21:58:59,303 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-11-06 21:58:59,303 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-11-06 21:58:59,303 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-11-06 21:58:59,304 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-11-06 21:58:59,304 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-11-06 21:58:59,304 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2019-11-06 21:58:59,305 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-11-06 21:58:59,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-06 21:58:59,305 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 21:58:59,305 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-06 21:58:59,306 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-06 21:58:59,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 21:58:59,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-06 21:58:59,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 21:58:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-06 21:58:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-06 21:58:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:58:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-06 21:58:59,307 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-06 21:58:59,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 21:58:59,309 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-06 21:58:59,309 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-06 21:58:59,310 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-06 21:58:59,310 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-06 21:58:59,310 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2019-11-06 21:58:59,310 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-06 21:58:59,310 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-06 21:58:59,311 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-06 21:58:59,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:58:59,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:58:59,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-06 21:58:59,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:59:00,567 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:59:00,568 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-06 21:59:00,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:59:00 BoogieIcfgContainer [2019-11-06 21:59:00,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:59:00,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:59:00,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:59:00,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:59:00,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:58:58" (1/3) ... [2019-11-06 21:59:00,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d76f565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:59:00, skipping insertion in model container [2019-11-06 21:59:00,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:59" (2/3) ... [2019-11-06 21:59:00,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d76f565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:59:00, skipping insertion in model container [2019-11-06 21:59:00,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:59:00" (3/3) ... [2019-11-06 21:59:00,577 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product55.cil.c [2019-11-06 21:59:00,587 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:59:00,595 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:59:00,607 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:59:00,633 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:59:00,633 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:59:00,633 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:59:00,633 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:59:00,634 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:59:00,634 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:59:00,634 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:59:00,634 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:59:00,657 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states. [2019-11-06 21:59:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 21:59:00,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:59:00,668 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 21:59:00,670 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:59:00,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:59:00,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1134611440, now seen corresponding path program 1 times [2019-11-06 21:59:00,683 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:59:00,684 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257711842] [2019-11-06 21:59:00,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:59:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:01,387 WARN L191 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:59:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:01,472 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 21:59:01,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257711842] [2019-11-06 21:59:01,474 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:59:01,474 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 21:59:01,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769494469] [2019-11-06 21:59:01,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:59:01,482 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:59:01,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:59:01,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:59:01,500 INFO L87 Difference]: Start difference. First operand 197 states. Second operand 4 states. [2019-11-06 21:59:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:59:02,780 INFO L93 Difference]: Finished difference Result 343 states and 449 transitions. [2019-11-06 21:59:02,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:59:02,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2019-11-06 21:59:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:59:02,797 INFO L225 Difference]: With dead ends: 343 [2019-11-06 21:59:02,797 INFO L226 Difference]: Without dead ends: 190 [2019-11-06 21:59:02,803 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:59:02,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-11-06 21:59:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2019-11-06 21:59:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-11-06 21:59:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2019-11-06 21:59:02,901 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 51 [2019-11-06 21:59:02,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:59:02,902 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2019-11-06 21:59:02,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:59:02,902 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2019-11-06 21:59:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 21:59:02,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:59:02,906 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] [2019-11-06 21:59:02,906 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:59:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:59:02,907 INFO L82 PathProgramCache]: Analyzing trace with hash -179918531, now seen corresponding path program 1 times [2019-11-06 21:59:02,907 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:59:02,907 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234716115] [2019-11-06 21:59:02,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:59:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:03,284 WARN L191 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:59:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:03,351 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 21:59:03,352 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234716115] [2019-11-06 21:59:03,352 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:59:03,352 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 21:59:03,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037478194] [2019-11-06 21:59:03,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:59:03,354 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:59:03,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:59:03,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:59:03,355 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand 5 states. [2019-11-06 21:59:03,941 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-06 21:59:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:59:05,058 INFO L93 Difference]: Finished difference Result 282 states and 352 transitions. [2019-11-06 21:59:05,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:59:05,059 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-11-06 21:59:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:59:05,062 INFO L225 Difference]: With dead ends: 282 [2019-11-06 21:59:05,062 INFO L226 Difference]: Without dead ends: 180 [2019-11-06 21:59:05,064 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:59:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-11-06 21:59:05,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 145. [2019-11-06 21:59:05,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-06 21:59:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2019-11-06 21:59:05,105 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 52 [2019-11-06 21:59:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:59:05,105 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2019-11-06 21:59:05,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:59:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2019-11-06 21:59:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 21:59:05,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:59:05,108 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] [2019-11-06 21:59:05,108 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:59:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:59:05,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1227863388, now seen corresponding path program 1 times [2019-11-06 21:59:05,109 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:59:05,109 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268795106] [2019-11-06 21:59:05,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:59:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:05,437 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:59:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:05,584 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 21:59:05,584 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268795106] [2019-11-06 21:59:05,584 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:59:05,585 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 21:59:05,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826724548] [2019-11-06 21:59:05,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:59:05,586 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:59:05,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:59:05,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:59:05,587 INFO L87 Difference]: Start difference. First operand 145 states and 172 transitions. Second operand 9 states. [2019-11-06 21:59:06,115 WARN L191 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-11-06 21:59:06,529 WARN L191 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2019-11-06 21:59:06,823 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-11-06 21:59:07,114 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-11-06 21:59:07,947 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-06 21:59:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:59:10,552 INFO L93 Difference]: Finished difference Result 487 states and 618 transitions. [2019-11-06 21:59:10,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 21:59:10,553 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-11-06 21:59:10,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:59:10,558 INFO L225 Difference]: With dead ends: 487 [2019-11-06 21:59:10,558 INFO L226 Difference]: Without dead ends: 370 [2019-11-06 21:59:10,560 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:59:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2019-11-06 21:59:10,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 305. [2019-11-06 21:59:10,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2019-11-06 21:59:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 374 transitions. [2019-11-06 21:59:10,645 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 374 transitions. Word has length 56 [2019-11-06 21:59:10,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:59:10,645 INFO L462 AbstractCegarLoop]: Abstraction has 305 states and 374 transitions. [2019-11-06 21:59:10,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:59:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 374 transitions. [2019-11-06 21:59:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 21:59:10,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:59:10,649 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, 1] [2019-11-06 21:59:10,649 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:59:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:59:10,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1601957820, now seen corresponding path program 1 times [2019-11-06 21:59:10,649 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:59:10,650 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16186671] [2019-11-06 21:59:10,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:59:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:10,953 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:59:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:11,047 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 21:59:11,047 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16186671] [2019-11-06 21:59:11,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:59:11,047 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 21:59:11,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180285723] [2019-11-06 21:59:11,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:59:11,048 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:59:11,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:59:11,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:59:11,049 INFO L87 Difference]: Start difference. First operand 305 states and 374 transitions. Second operand 9 states. [2019-11-06 21:59:11,580 WARN L191 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-11-06 21:59:12,659 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-11-06 21:59:13,199 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-11-06 21:59:13,548 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-11-06 21:59:13,853 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-11-06 21:59:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:59:15,817 INFO L93 Difference]: Finished difference Result 973 states and 1285 transitions. [2019-11-06 21:59:15,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 21:59:15,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2019-11-06 21:59:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:59:15,825 INFO L225 Difference]: With dead ends: 973 [2019-11-06 21:59:15,825 INFO L226 Difference]: Without dead ends: 696 [2019-11-06 21:59:15,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2019-11-06 21:59:15,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2019-11-06 21:59:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 558. [2019-11-06 21:59:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 21:59:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 688 transitions. [2019-11-06 21:59:15,951 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 688 transitions. Word has length 62 [2019-11-06 21:59:15,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:59:15,951 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 688 transitions. [2019-11-06 21:59:15,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:59:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 688 transitions. [2019-11-06 21:59:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 21:59:15,956 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:59:15,956 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, 1, 1, 1, 1, 1] [2019-11-06 21:59:15,956 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:59:15,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:59:15,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1204720808, now seen corresponding path program 1 times [2019-11-06 21:59:15,957 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:59:15,957 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143519561] [2019-11-06 21:59:15,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:59:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:16,338 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:59:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:16,441 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 21:59:16,442 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143519561] [2019-11-06 21:59:16,442 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:59:16,442 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-06 21:59:16,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66330053] [2019-11-06 21:59:16,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:59:16,443 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:59:16,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:59:16,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:59:16,444 INFO L87 Difference]: Start difference. First operand 558 states and 688 transitions. Second operand 10 states. [2019-11-06 21:59:16,917 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-11-06 21:59:18,024 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-11-06 21:59:18,352 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-11-06 21:59:18,632 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-11-06 21:59:19,421 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-11-06 21:59:20,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:59:20,899 INFO L93 Difference]: Finished difference Result 1531 states and 2090 transitions. [2019-11-06 21:59:20,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 21:59:20,899 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2019-11-06 21:59:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:59:20,907 INFO L225 Difference]: With dead ends: 1531 [2019-11-06 21:59:20,908 INFO L226 Difference]: Without dead ends: 1001 [2019-11-06 21:59:20,910 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2019-11-06 21:59:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2019-11-06 21:59:21,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 805. [2019-11-06 21:59:21,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 805 states. [2019-11-06 21:59:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 983 transitions. [2019-11-06 21:59:21,067 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 983 transitions. Word has length 66 [2019-11-06 21:59:21,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:59:21,068 INFO L462 AbstractCegarLoop]: Abstraction has 805 states and 983 transitions. [2019-11-06 21:59:21,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:59:21,068 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 983 transitions. [2019-11-06 21:59:21,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-06 21:59:21,071 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:59:21,071 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:21,071 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:59:21,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:59:21,072 INFO L82 PathProgramCache]: Analyzing trace with hash -763723638, now seen corresponding path program 1 times [2019-11-06 21:59:21,072 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:59:21,072 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167849640] [2019-11-06 21:59:21,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:59:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,329 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:59:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:21,510 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 21:59:21,510 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167849640] [2019-11-06 21:59:21,511 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:59:21,511 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-06 21:59:21,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748920969] [2019-11-06 21:59:21,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:59:21,512 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:59:21,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:59:21,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:59:21,513 INFO L87 Difference]: Start difference. First operand 805 states and 983 transitions. Second operand 10 states. [2019-11-06 21:59:22,867 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-11-06 21:59:23,164 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2019-11-06 21:59:23,473 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-06 21:59:23,741 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-06 21:59:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:59:25,101 INFO L93 Difference]: Finished difference Result 1854 states and 2470 transitions. [2019-11-06 21:59:25,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 21:59:25,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2019-11-06 21:59:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:59:25,113 INFO L225 Difference]: With dead ends: 1854 [2019-11-06 21:59:25,113 INFO L226 Difference]: Without dead ends: 1077 [2019-11-06 21:59:25,117 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:59:25,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2019-11-06 21:59:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 831. [2019-11-06 21:59:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2019-11-06 21:59:25,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1011 transitions. [2019-11-06 21:59:25,276 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1011 transitions. Word has length 93 [2019-11-06 21:59:25,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:59:25,278 INFO L462 AbstractCegarLoop]: Abstraction has 831 states and 1011 transitions. [2019-11-06 21:59:25,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:59:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1011 transitions. [2019-11-06 21:59:25,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-06 21:59:25,283 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:59:25,284 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:25,284 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:59:25,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:59:25,285 INFO L82 PathProgramCache]: Analyzing trace with hash -836110196, now seen corresponding path program 1 times [2019-11-06 21:59:25,285 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:59:25,285 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081292275] [2019-11-06 21:59:25,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:59:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,616 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:59:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:25,754 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 21:59:25,755 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081292275] [2019-11-06 21:59:25,755 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:59:25,755 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-06 21:59:25,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895655477] [2019-11-06 21:59:25,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:59:25,756 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:59:25,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:59:25,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:59:25,757 INFO L87 Difference]: Start difference. First operand 831 states and 1011 transitions. Second operand 12 states. [2019-11-06 21:59:26,510 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2019-11-06 21:59:26,769 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-06 21:59:27,015 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-06 21:59:27,859 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-06 21:59:28,178 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-06 21:59:28,480 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-06 21:59:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:59:30,238 INFO L93 Difference]: Finished difference Result 1908 states and 2587 transitions. [2019-11-06 21:59:30,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 21:59:30,239 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 93 [2019-11-06 21:59:30,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:59:30,247 INFO L225 Difference]: With dead ends: 1908 [2019-11-06 21:59:30,247 INFO L226 Difference]: Without dead ends: 1105 [2019-11-06 21:59:30,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2019-11-06 21:59:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2019-11-06 21:59:30,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 847. [2019-11-06 21:59:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2019-11-06 21:59:30,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1027 transitions. [2019-11-06 21:59:30,435 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1027 transitions. Word has length 93 [2019-11-06 21:59:30,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:59:30,436 INFO L462 AbstractCegarLoop]: Abstraction has 847 states and 1027 transitions. [2019-11-06 21:59:30,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:59:30,436 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1027 transitions. [2019-11-06 21:59:30,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-06 21:59:30,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:59:30,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:30,439 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:59:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:59:30,440 INFO L82 PathProgramCache]: Analyzing trace with hash -506344435, now seen corresponding path program 1 times [2019-11-06 21:59:30,440 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:59:30,441 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091951994] [2019-11-06 21:59:30,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:59:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,770 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:59:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:30,941 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 21:59:30,942 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091951994] [2019-11-06 21:59:30,942 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:59:30,942 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 21:59:30,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736264285] [2019-11-06 21:59:30,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:59:30,943 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:59:30,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:59:30,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:59:30,944 INFO L87 Difference]: Start difference. First operand 847 states and 1027 transitions. Second operand 8 states. [2019-11-06 21:59:31,476 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-11-06 21:59:32,023 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-11-06 21:59:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:59:35,031 INFO L93 Difference]: Finished difference Result 2850 states and 3893 transitions. [2019-11-06 21:59:35,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 21:59:35,032 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 93 [2019-11-06 21:59:35,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:59:35,046 INFO L225 Difference]: With dead ends: 2850 [2019-11-06 21:59:35,046 INFO L226 Difference]: Without dead ends: 2031 [2019-11-06 21:59:35,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2019-11-06 21:59:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2019-11-06 21:59:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1687. [2019-11-06 21:59:35,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1687 states. [2019-11-06 21:59:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2069 transitions. [2019-11-06 21:59:35,332 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2069 transitions. Word has length 93 [2019-11-06 21:59:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:59:35,333 INFO L462 AbstractCegarLoop]: Abstraction has 1687 states and 2069 transitions. [2019-11-06 21:59:35,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:59:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2069 transitions. [2019-11-06 21:59:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 21:59:35,337 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:59:35,337 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:35,338 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:59:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:59:35,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1600364013, now seen corresponding path program 1 times [2019-11-06 21:59:35,338 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:59:35,339 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801564231] [2019-11-06 21:59:35,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:59:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,711 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-06 21:59:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:59:35,872 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 21:59:35,873 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801564231] [2019-11-06 21:59:35,873 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:59:35,873 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 21:59:35,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609760584] [2019-11-06 21:59:35,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:59:35,876 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:59:35,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:59:35,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:59:35,877 INFO L87 Difference]: Start difference. First operand 1687 states and 2069 transitions. Second operand 8 states. [2019-11-06 21:59:36,381 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 189