java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec5_product50.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:07:39,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:07:39,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:07:39,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:07:39,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:07:39,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:07:39,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:07:39,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:07:39,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:07:39,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:07:39,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:07:39,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:07:39,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:07:39,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:07:39,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:07:39,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:07:39,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:07:39,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:07:39,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:07:39,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:07:39,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:07:39,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:07:39,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:07:39,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:07:39,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:07:39,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:07:39,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:07:39,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:07:39,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:07:39,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:07:39,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:07:39,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:07:39,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:07:39,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:07:39,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:07:39,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:07:39,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:07:39,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:07:39,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:07:39,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:07:39,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:07:39,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 13:07:39,480 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:07:39,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:07:39,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 13:07:39,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 13:07:39,483 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 13:07:39,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:07:39,484 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:07:39,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 13:07:39,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:07:39,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:07:39,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:07:39,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:07:39,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:07:39,487 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:07:39,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:07:39,488 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 13:07:39,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:07:39,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:07:39,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:07:39,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 13:07:39,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 13:07:39,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:07:39,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:07:39,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:07:39,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 13:07:39,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 13:07:39,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:07:39,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 13:07:39,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:07:39,537 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:07:39,549 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:07:39,552 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:07:39,554 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:07:39,554 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:07:39,555 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec5_product50.cil.c [2019-09-20 13:07:39,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/029e1d604/b7b26cd693474162874a18eebca1e9b4/FLAGa9ea2f8a8 [2019-09-20 13:07:40,177 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:07:40,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec5_product50.cil.c [2019-09-20 13:07:40,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/029e1d604/b7b26cd693474162874a18eebca1e9b4/FLAGa9ea2f8a8 [2019-09-20 13:07:40,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/029e1d604/b7b26cd693474162874a18eebca1e9b4 [2019-09-20 13:07:40,497 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:07:40,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:07:40,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:07:40,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:07:40,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:07:40,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:07:40" (1/1) ... [2019-09-20 13:07:40,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66650e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:40, skipping insertion in model container [2019-09-20 13:07:40,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:07:40" (1/1) ... [2019-09-20 13:07:40,515 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:07:40,573 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:07:41,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:07:41,104 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:07:41,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:07:41,251 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:07:41,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:41 WrapperNode [2019-09-20 13:07:41,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:07:41,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:07:41,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:07:41,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:07:41,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:41" (1/1) ... [2019-09-20 13:07:41,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:41" (1/1) ... [2019-09-20 13:07:41,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:41" (1/1) ... [2019-09-20 13:07:41,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:41" (1/1) ... [2019-09-20 13:07:41,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:41" (1/1) ... [2019-09-20 13:07:41,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:41" (1/1) ... [2019-09-20 13:07:41,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:41" (1/1) ... [2019-09-20 13:07:41,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:07:41,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:07:41,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:07:41,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:07:41,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:07:41,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:07:41,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:07:41,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-09-20 13:07:41,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-09-20 13:07:41,419 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-09-20 13:07:41,420 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-09-20 13:07:41,420 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-09-20 13:07:41,420 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-09-20 13:07:41,420 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-09-20 13:07:41,420 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-09-20 13:07:41,421 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-09-20 13:07:41,421 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-09-20 13:07:41,421 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-09-20 13:07:41,421 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-09-20 13:07:41,421 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-09-20 13:07:41,422 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2019-09-20 13:07:41,422 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-09-20 13:07:41,422 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-09-20 13:07:41,422 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-09-20 13:07:41,422 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-09-20 13:07:41,422 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-09-20 13:07:41,423 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-09-20 13:07:41,423 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-09-20 13:07:41,423 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-09-20 13:07:41,423 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-09-20 13:07:41,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-09-20 13:07:41,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-09-20 13:07:41,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-09-20 13:07:41,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-09-20 13:07:41,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-09-20 13:07:41,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-09-20 13:07:41,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__1 [2019-09-20 13:07:41,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__2 [2019-09-20 13:07:41,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__3 [2019-09-20 13:07:41,425 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-09-20 13:07:41,425 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-09-20 13:07:41,425 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-09-20 13:07:41,425 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-09-20 13:07:41,425 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-09-20 13:07:41,426 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-09-20 13:07:41,426 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-09-20 13:07:41,426 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-09-20 13:07:41,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:07:41,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:07:41,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:07:41,427 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-09-20 13:07:41,427 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-09-20 13:07:41,427 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-09-20 13:07:41,427 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-09-20 13:07:41,427 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-09-20 13:07:41,427 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-09-20 13:07:41,427 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-09-20 13:07:41,428 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-09-20 13:07:41,428 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-09-20 13:07:41,428 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-09-20 13:07:41,428 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-09-20 13:07:41,428 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-09-20 13:07:41,428 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2019-09-20 13:07:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__2 [2019-09-20 13:07:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__3 [2019-09-20 13:07:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-09-20 13:07:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-09-20 13:07:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-09-20 13:07:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-09-20 13:07:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-09-20 13:07:41,430 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-09-20 13:07:41,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:07:41,430 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-09-20 13:07:41,430 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-09-20 13:07:41,430 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-09-20 13:07:41,430 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-09-20 13:07:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-09-20 13:07:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-09-20 13:07:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-20 13:07:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-20 13:07:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-09-20 13:07:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-20 13:07:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-20 13:07:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:07:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-20 13:07:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-09-20 13:07:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:07:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-09-20 13:07:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-09-20 13:07:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:07:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-09-20 13:07:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-09-20 13:07:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-09-20 13:07:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__1 [2019-09-20 13:07:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-09-20 13:07:41,434 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-09-20 13:07:41,434 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-09-20 13:07:41,434 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-09-20 13:07:41,434 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-09-20 13:07:41,434 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-09-20 13:07:41,434 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-09-20 13:07:41,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:07:41,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:07:41,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-20 13:07:41,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:07:42,623 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:07:42,624 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-20 13:07:42,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:07:42 BoogieIcfgContainer [2019-09-20 13:07:42,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:07:42,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:07:42,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:07:42,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:07:42,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:07:40" (1/3) ... [2019-09-20 13:07:42,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225f51da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:07:42, skipping insertion in model container [2019-09-20 13:07:42,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:41" (2/3) ... [2019-09-20 13:07:42,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225f51da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:07:42, skipping insertion in model container [2019-09-20 13:07:42,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:07:42" (3/3) ... [2019-09-20 13:07:42,636 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product50.cil.c [2019-09-20 13:07:42,647 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:07:42,659 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:07:42,677 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:07:42,720 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 13:07:42,721 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:07:42,721 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 13:07:42,721 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:07:42,722 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:07:42,722 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:07:42,722 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:07:42,723 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:07:42,724 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:07:42,749 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states. [2019-09-20 13:07:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-20 13:07:42,760 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:42,761 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:42,764 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:42,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2053229239, now seen corresponding path program 1 times [2019-09-20 13:07:42,771 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:42,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:42,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:42,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:42,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:43,097 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:43,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:07:43,103 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:07:43,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:07:43,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:07:43,121 INFO L87 Difference]: Start difference. First operand 185 states. Second operand 2 states. [2019-09-20 13:07:43,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:43,169 INFO L93 Difference]: Finished difference Result 280 states and 345 transitions. [2019-09-20 13:07:43,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:07:43,171 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 59 [2019-09-20 13:07:43,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:43,186 INFO L225 Difference]: With dead ends: 280 [2019-09-20 13:07:43,186 INFO L226 Difference]: Without dead ends: 142 [2019-09-20 13:07:43,191 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:07:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-09-20 13:07:43,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2019-09-20 13:07:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-20 13:07:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 166 transitions. [2019-09-20 13:07:43,251 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 166 transitions. Word has length 59 [2019-09-20 13:07:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:43,251 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 166 transitions. [2019-09-20 13:07:43,252 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:07:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 166 transitions. [2019-09-20 13:07:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-20 13:07:43,256 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:43,256 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:43,257 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:43,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1701396789, now seen corresponding path program 1 times [2019-09-20 13:07:43,258 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:43,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:43,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:43,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:43,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:43,454 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:43,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:07:43,457 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:07:43,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:07:43,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:07:43,459 INFO L87 Difference]: Start difference. First operand 142 states and 166 transitions. Second operand 3 states. [2019-09-20 13:07:43,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:43,504 INFO L93 Difference]: Finished difference Result 225 states and 263 transitions. [2019-09-20 13:07:43,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:07:43,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2019-09-20 13:07:43,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:43,509 INFO L225 Difference]: With dead ends: 225 [2019-09-20 13:07:43,510 INFO L226 Difference]: Without dead ends: 133 [2019-09-20 13:07:43,513 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:07:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-09-20 13:07:43,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2019-09-20 13:07:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-09-20 13:07:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2019-09-20 13:07:43,545 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 60 [2019-09-20 13:07:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:43,549 INFO L475 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2019-09-20 13:07:43,549 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:07:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2019-09-20 13:07:43,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-20 13:07:43,554 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:43,555 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:43,555 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:43,558 INFO L82 PathProgramCache]: Analyzing trace with hash -835538636, now seen corresponding path program 1 times [2019-09-20 13:07:43,558 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:43,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:43,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:43,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:43,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:43,774 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:43,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-20 13:07:43,775 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:07:43,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:07:43,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:07:43,776 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand 7 states. [2019-09-20 13:07:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:44,120 INFO L93 Difference]: Finished difference Result 238 states and 281 transitions. [2019-09-20 13:07:44,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:07:44,121 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2019-09-20 13:07:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:44,124 INFO L225 Difference]: With dead ends: 238 [2019-09-20 13:07:44,124 INFO L226 Difference]: Without dead ends: 133 [2019-09-20 13:07:44,125 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-09-20 13:07:44,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-09-20 13:07:44,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2019-09-20 13:07:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-09-20 13:07:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2019-09-20 13:07:44,142 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 65 [2019-09-20 13:07:44,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:44,144 INFO L475 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2019-09-20 13:07:44,144 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:07:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2019-09-20 13:07:44,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-20 13:07:44,147 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:44,147 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:44,148 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:44,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:44,148 INFO L82 PathProgramCache]: Analyzing trace with hash -192684169, now seen corresponding path program 1 times [2019-09-20 13:07:44,148 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:44,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:44,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:44,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:44,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:44,349 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:44,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:07:44,351 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:07:44,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:07:44,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:07:44,352 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand 5 states. [2019-09-20 13:07:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:44,883 INFO L93 Difference]: Finished difference Result 344 states and 415 transitions. [2019-09-20 13:07:44,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:07:44,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2019-09-20 13:07:44,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:44,890 INFO L225 Difference]: With dead ends: 344 [2019-09-20 13:07:44,890 INFO L226 Difference]: Without dead ends: 239 [2019-09-20 13:07:44,895 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:07:44,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-09-20 13:07:44,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 220. [2019-09-20 13:07:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-09-20 13:07:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 252 transitions. [2019-09-20 13:07:44,942 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 252 transitions. Word has length 78 [2019-09-20 13:07:44,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:44,942 INFO L475 AbstractCegarLoop]: Abstraction has 220 states and 252 transitions. [2019-09-20 13:07:44,942 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:07:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 252 transitions. [2019-09-20 13:07:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-20 13:07:44,948 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:44,948 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:44,949 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:44,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1827957124, now seen corresponding path program 1 times [2019-09-20 13:07:44,952 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:44,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:44,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:44,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:44,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:45,078 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:45,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-09-20 13:07:45,079 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 13:07:45,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 13:07:45,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:07:45,079 INFO L87 Difference]: Start difference. First operand 220 states and 252 transitions. Second operand 8 states. [2019-09-20 13:07:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:45,125 INFO L93 Difference]: Finished difference Result 419 states and 493 transitions. [2019-09-20 13:07:45,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:07:45,125 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 92 [2019-09-20 13:07:45,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:45,129 INFO L225 Difference]: With dead ends: 419 [2019-09-20 13:07:45,129 INFO L226 Difference]: Without dead ends: 227 [2019-09-20 13:07:45,130 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:07:45,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-09-20 13:07:45,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2019-09-20 13:07:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2019-09-20 13:07:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 256 transitions. [2019-09-20 13:07:45,148 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 256 transitions. Word has length 92 [2019-09-20 13:07:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:45,148 INFO L475 AbstractCegarLoop]: Abstraction has 224 states and 256 transitions. [2019-09-20 13:07:45,148 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 13:07:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 256 transitions. [2019-09-20 13:07:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-20 13:07:45,150 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:45,150 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:45,151 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:45,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:45,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1850589378, now seen corresponding path program 1 times [2019-09-20 13:07:45,151 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:45,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:45,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:45,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:45,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 13:07:45,277 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:45,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-20 13:07:45,277 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:07:45,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:07:45,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:07:45,278 INFO L87 Difference]: Start difference. First operand 224 states and 256 transitions. Second operand 7 states. [2019-09-20 13:07:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:45,953 INFO L93 Difference]: Finished difference Result 438 states and 517 transitions. [2019-09-20 13:07:45,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-20 13:07:45,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2019-09-20 13:07:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:45,957 INFO L225 Difference]: With dead ends: 438 [2019-09-20 13:07:45,957 INFO L226 Difference]: Without dead ends: 242 [2019-09-20 13:07:45,958 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:07:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-09-20 13:07:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 223. [2019-09-20 13:07:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-09-20 13:07:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 253 transitions. [2019-09-20 13:07:45,976 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 253 transitions. Word has length 92 [2019-09-20 13:07:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:45,977 INFO L475 AbstractCegarLoop]: Abstraction has 223 states and 253 transitions. [2019-09-20 13:07:45,977 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:07:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 253 transitions. [2019-09-20 13:07:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-20 13:07:45,979 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:45,979 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:45,979 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:45,980 INFO L82 PathProgramCache]: Analyzing trace with hash -185232827, now seen corresponding path program 1 times [2019-09-20 13:07:45,980 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:45,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:45,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:45,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:45,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:46,060 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:46,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:07:46,061 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:07:46,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:07:46,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:07:46,062 INFO L87 Difference]: Start difference. First operand 223 states and 253 transitions. Second operand 6 states. [2019-09-20 13:07:46,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:46,100 INFO L93 Difference]: Finished difference Result 423 states and 488 transitions. [2019-09-20 13:07:46,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:07:46,101 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2019-09-20 13:07:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:46,105 INFO L225 Difference]: With dead ends: 423 [2019-09-20 13:07:46,105 INFO L226 Difference]: Without dead ends: 228 [2019-09-20 13:07:46,106 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:07:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-09-20 13:07:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2019-09-20 13:07:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-09-20 13:07:46,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 258 transitions. [2019-09-20 13:07:46,128 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 258 transitions. Word has length 93 [2019-09-20 13:07:46,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:46,129 INFO L475 AbstractCegarLoop]: Abstraction has 228 states and 258 transitions. [2019-09-20 13:07:46,129 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:07:46,129 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 258 transitions. [2019-09-20 13:07:46,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-20 13:07:46,132 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:46,132 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:46,132 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2053119352, now seen corresponding path program 1 times [2019-09-20 13:07:46,133 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:46,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:46,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:46,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:46,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:46,274 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:46,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:07:46,275 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:07:46,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:07:46,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:07:46,277 INFO L87 Difference]: Start difference. First operand 228 states and 258 transitions. Second operand 4 states. [2019-09-20 13:07:46,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:46,497 INFO L93 Difference]: Finished difference Result 667 states and 791 transitions. [2019-09-20 13:07:46,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:07:46,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2019-09-20 13:07:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:46,505 INFO L225 Difference]: With dead ends: 667 [2019-09-20 13:07:46,506 INFO L226 Difference]: Without dead ends: 467 [2019-09-20 13:07:46,507 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:07:46,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2019-09-20 13:07:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 458. [2019-09-20 13:07:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2019-09-20 13:07:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 532 transitions. [2019-09-20 13:07:46,549 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 532 transitions. Word has length 93 [2019-09-20 13:07:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:46,553 INFO L475 AbstractCegarLoop]: Abstraction has 458 states and 532 transitions. [2019-09-20 13:07:46,553 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:07:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 532 transitions. [2019-09-20 13:07:46,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-20 13:07:46,556 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:46,557 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:46,557 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:46,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:46,557 INFO L82 PathProgramCache]: Analyzing trace with hash 868259694, now seen corresponding path program 1 times [2019-09-20 13:07:46,557 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:46,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:46,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:46,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:46,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:07:46,762 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:07:46,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-09-20 13:07:46,762 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 13:07:46,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 13:07:46,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:07:46,763 INFO L87 Difference]: Start difference. First operand 458 states and 532 transitions. Second operand 9 states. [2019-09-20 13:07:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:47,845 INFO L93 Difference]: Finished difference Result 1203 states and 1461 transitions. [2019-09-20 13:07:47,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-20 13:07:47,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 97 [2019-09-20 13:07:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:47,853 INFO L225 Difference]: With dead ends: 1203 [2019-09-20 13:07:47,853 INFO L226 Difference]: Without dead ends: 845 [2019-09-20 13:07:47,855 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-09-20 13:07:47,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2019-09-20 13:07:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 764. [2019-09-20 13:07:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2019-09-20 13:07:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 877 transitions. [2019-09-20 13:07:47,911 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 877 transitions. Word has length 97 [2019-09-20 13:07:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:47,911 INFO L475 AbstractCegarLoop]: Abstraction has 764 states and 877 transitions. [2019-09-20 13:07:47,911 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 13:07:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 877 transitions. [2019-09-20 13:07:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-20 13:07:47,916 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:47,916 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:47,916 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1063606964, now seen corresponding path program 1 times [2019-09-20 13:07:47,917 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:47,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:47,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:47,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:47,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-20 13:07:48,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:07:48,110 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:07:48,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:48,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-20 13:07:48,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:07:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:07:48,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:07:48,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2019-09-20 13:07:48,501 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-20 13:07:48,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-20 13:07:48,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-20 13:07:48,502 INFO L87 Difference]: Start difference. First operand 764 states and 877 transitions. Second operand 16 states. [2019-09-20 13:07:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:49,775 INFO L93 Difference]: Finished difference Result 1740 states and 2073 transitions. [2019-09-20 13:07:49,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-20 13:07:49,775 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2019-09-20 13:07:49,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:49,782 INFO L225 Difference]: With dead ends: 1740 [2019-09-20 13:07:49,783 INFO L226 Difference]: Without dead ends: 1074 [2019-09-20 13:07:49,785 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2019-09-20 13:07:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2019-09-20 13:07:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 930. [2019-09-20 13:07:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2019-09-20 13:07:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1077 transitions. [2019-09-20 13:07:49,845 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1077 transitions. Word has length 159 [2019-09-20 13:07:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:49,846 INFO L475 AbstractCegarLoop]: Abstraction has 930 states and 1077 transitions. [2019-09-20 13:07:49,846 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-20 13:07:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1077 transitions. [2019-09-20 13:07:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-09-20 13:07:49,853 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:49,853 INFO L407 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:49,854 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:49,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:49,854 INFO L82 PathProgramCache]: Analyzing trace with hash -810254798, now seen corresponding path program 1 times [2019-09-20 13:07:49,855 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:49,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:49,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:49,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:49,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-09-20 13:07:50,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:07:50,086 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:07:50,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:50,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-20 13:07:50,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:07:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 205 proven. 4 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 13:07:50,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:07:50,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12] total 16 [2019-09-20 13:07:50,560 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-20 13:07:50,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-20 13:07:50,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2019-09-20 13:07:50,561 INFO L87 Difference]: Start difference. First operand 930 states and 1077 transitions. Second operand 16 states. [2019-09-20 13:07:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:53,173 INFO L93 Difference]: Finished difference Result 2370 states and 3162 transitions. [2019-09-20 13:07:53,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-20 13:07:53,174 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 281 [2019-09-20 13:07:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:53,188 INFO L225 Difference]: With dead ends: 2370 [2019-09-20 13:07:53,188 INFO L226 Difference]: Without dead ends: 1491 [2019-09-20 13:07:53,193 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2019-09-20 13:07:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2019-09-20 13:07:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1027. [2019-09-20 13:07:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2019-09-20 13:07:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1164 transitions. [2019-09-20 13:07:53,289 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1164 transitions. Word has length 281 [2019-09-20 13:07:53,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:53,290 INFO L475 AbstractCegarLoop]: Abstraction has 1027 states and 1164 transitions. [2019-09-20 13:07:53,290 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-20 13:07:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1164 transitions. [2019-09-20 13:07:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2019-09-20 13:07:53,301 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:53,302 INFO L407 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:53,302 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:53,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:53,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1594137664, now seen corresponding path program 1 times [2019-09-20 13:07:53,303 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:53,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:53,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:53,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:53,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 98 proven. 53 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-20 13:07:53,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:07:53,688 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:07:53,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:54,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 1277 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-20 13:07:54,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:07:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 240 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-20 13:07:54,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:07:54,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2019-09-20 13:07:54,321 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-20 13:07:54,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-20 13:07:54,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2019-09-20 13:07:54,322 INFO L87 Difference]: Start difference. First operand 1027 states and 1164 transitions. Second operand 20 states. [2019-09-20 13:07:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:07:57,227 INFO L93 Difference]: Finished difference Result 1935 states and 2208 transitions. [2019-09-20 13:07:57,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-20 13:07:57,228 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 293 [2019-09-20 13:07:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:07:57,233 INFO L225 Difference]: With dead ends: 1935 [2019-09-20 13:07:57,234 INFO L226 Difference]: Without dead ends: 1029 [2019-09-20 13:07:57,236 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2019-09-20 13:07:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2019-09-20 13:07:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 1027. [2019-09-20 13:07:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2019-09-20 13:07:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1160 transitions. [2019-09-20 13:07:57,303 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1160 transitions. Word has length 293 [2019-09-20 13:07:57,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:07:57,305 INFO L475 AbstractCegarLoop]: Abstraction has 1027 states and 1160 transitions. [2019-09-20 13:07:57,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-20 13:07:57,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1160 transitions. [2019-09-20 13:07:57,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-09-20 13:07:57,312 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:07:57,312 INFO L407 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:07:57,312 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:07:57,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:07:57,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1477436418, now seen corresponding path program 1 times [2019-09-20 13:07:57,313 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:07:57,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:07:57,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:57,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:57,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:07:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-09-20 13:07:57,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:07:57,592 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:07:57,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:07:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:07:57,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 1277 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-20 13:07:57,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:07:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 166 proven. 16 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-09-20 13:07:58,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:07:58,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 14 [2019-09-20 13:07:58,031 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-20 13:07:58,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-20 13:07:58,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-09-20 13:07:58,032 INFO L87 Difference]: Start difference. First operand 1027 states and 1160 transitions. Second operand 14 states. [2019-09-20 13:08:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:00,362 INFO L93 Difference]: Finished difference Result 2223 states and 2732 transitions. [2019-09-20 13:08:00,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-20 13:08:00,362 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 294 [2019-09-20 13:08:00,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:00,379 INFO L225 Difference]: With dead ends: 2223 [2019-09-20 13:08:00,379 INFO L226 Difference]: Without dead ends: 1647 [2019-09-20 13:08:00,384 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 313 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=249, Invalid=743, Unknown=0, NotChecked=0, Total=992 [2019-09-20 13:08:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2019-09-20 13:08:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1281. [2019-09-20 13:08:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2019-09-20 13:08:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1452 transitions. [2019-09-20 13:08:00,520 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1452 transitions. Word has length 294 [2019-09-20 13:08:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:00,523 INFO L475 AbstractCegarLoop]: Abstraction has 1281 states and 1452 transitions. [2019-09-20 13:08:00,523 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-20 13:08:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1452 transitions. [2019-09-20 13:08:00,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2019-09-20 13:08:00,539 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:00,540 INFO L407 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:08:00,540 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:00,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:00,541 INFO L82 PathProgramCache]: Analyzing trace with hash 488916222, now seen corresponding path program 1 times [2019-09-20 13:08:00,541 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:00,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:00,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:00,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:00,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 154 proven. 58 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-09-20 13:08:01,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:08:01,289 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:08:01,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:01,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-20 13:08:01,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:08:01,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:08:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 359 proven. 16 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 13:08:01,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:08:01,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2019-09-20 13:08:01,935 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-20 13:08:01,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-20 13:08:01,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2019-09-20 13:08:01,936 INFO L87 Difference]: Start difference. First operand 1281 states and 1452 transitions. Second operand 23 states. [2019-09-20 13:08:07,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:07,881 INFO L93 Difference]: Finished difference Result 3593 states and 4225 transitions. [2019-09-20 13:08:07,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-20 13:08:07,882 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 363 [2019-09-20 13:08:07,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:07,896 INFO L225 Difference]: With dead ends: 3593 [2019-09-20 13:08:07,896 INFO L226 Difference]: Without dead ends: 2327 [2019-09-20 13:08:07,903 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 378 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=631, Invalid=3925, Unknown=0, NotChecked=0, Total=4556 [2019-09-20 13:08:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2019-09-20 13:08:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 2009. [2019-09-20 13:08:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2009 states. [2019-09-20 13:08:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2282 transitions. [2019-09-20 13:08:08,039 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2282 transitions. Word has length 363 [2019-09-20 13:08:08,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:08,040 INFO L475 AbstractCegarLoop]: Abstraction has 2009 states and 2282 transitions. [2019-09-20 13:08:08,040 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-20 13:08:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2282 transitions. [2019-09-20 13:08:08,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2019-09-20 13:08:08,053 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:08,054 INFO L407 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:08:08,054 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:08,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:08,055 INFO L82 PathProgramCache]: Analyzing trace with hash -366939983, now seen corresponding path program 1 times [2019-09-20 13:08:08,055 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:08,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:08,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:08,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:08,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 146 proven. 28 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2019-09-20 13:08:08,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:08:08,424 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:08:08,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:08,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-20 13:08:08,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:08:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-09-20 13:08:08,818 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:08:08,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2019-09-20 13:08:08,820 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-20 13:08:08,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-20 13:08:08,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:08:08,820 INFO L87 Difference]: Start difference. First operand 2009 states and 2282 transitions. Second operand 13 states. [2019-09-20 13:08:08,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:08,894 INFO L93 Difference]: Finished difference Result 2275 states and 2577 transitions. [2019-09-20 13:08:08,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 13:08:08,895 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 436 [2019-09-20 13:08:08,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:08,896 INFO L225 Difference]: With dead ends: 2275 [2019-09-20 13:08:08,896 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:08:08,909 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-09-20 13:08:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:08:08,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:08:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:08:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:08:08,911 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 436 [2019-09-20 13:08:08,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:08,911 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:08:08,911 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-20 13:08:08,912 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:08:08,912 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:08:08,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-20 13:08:10,102 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 28 [2019-09-20 13:08:10,345 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 28 [2019-09-20 13:08:10,565 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 24 [2019-09-20 13:08:10,965 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 27 [2019-09-20 13:08:11,259 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 29 [2019-09-20 13:08:11,693 WARN L191 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 42 [2019-09-20 13:08:11,954 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 1 [2019-09-20 13:08:12,114 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 1 [2019-09-20 13:08:12,363 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 27 [2019-09-20 13:08:12,507 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 27 [2019-09-20 13:08:12,729 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 22 [2019-09-20 13:08:13,071 WARN L191 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 34 [2019-09-20 13:08:13,220 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 24 [2019-09-20 13:08:13,342 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2019-09-20 13:08:13,465 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 19 [2019-09-20 13:08:13,672 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2019-09-20 13:08:13,796 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2019-09-20 13:08:14,262 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 28 [2019-09-20 13:08:14,715 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 28