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_product61.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:08:09,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:08:09,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:08:09,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:08:09,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:08:09,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:08:09,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:08:09,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:08:09,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:08:09,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:08:09,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:08:09,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:08:09,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:08:09,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:08:09,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:08:09,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:08:09,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:08:09,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:08:09,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:08:09,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:08:09,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:08:09,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:08:09,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:08:09,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:08:09,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:08:09,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:08:09,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:08:09,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:08:09,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:08:09,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:08:09,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:08:09,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:08:09,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:08:09,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:08:09,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:08:09,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:08:09,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:08:09,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:08:09,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:08:09,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:08:09,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:08:09,608 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 13:08:09,623 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:08:09,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:08:09,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 13:08:09,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 13:08:09,625 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 13:08:09,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:08:09,626 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:08:09,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 13:08:09,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:08:09,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:08:09,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:08:09,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:08:09,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:08:09,627 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:08:09,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:08:09,628 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 13:08:09,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:08:09,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:08:09,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:08:09,632 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 13:08:09,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 13:08:09,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:08:09,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:08:09,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:08:09,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 13:08:09,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 13:08:09,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:08:09,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 13:08:09,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:08:09,684 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:08:09,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:08:09,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:08:09,702 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:08:09,703 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:08:09,704 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec5_product61.cil.c [2019-09-20 13:08:09,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea40e05ce/4985495b17284a46af48b67b800f0abd/FLAG30e915e63 [2019-09-20 13:08:10,433 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:08:10,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec5_product61.cil.c [2019-09-20 13:08:10,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea40e05ce/4985495b17284a46af48b67b800f0abd/FLAG30e915e63 [2019-09-20 13:08:10,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea40e05ce/4985495b17284a46af48b67b800f0abd [2019-09-20 13:08:10,736 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:08:10,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:08:10,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:08:10,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:08:10,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:08:10,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:08:10" (1/1) ... [2019-09-20 13:08:10,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c4d59c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:08:10, skipping insertion in model container [2019-09-20 13:08:10,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:08:10" (1/1) ... [2019-09-20 13:08:10,755 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:08:10,819 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:08:11,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:08:11,270 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:08:11,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:08:11,468 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:08:11,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:08:11 WrapperNode [2019-09-20 13:08:11,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:08:11,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:08:11,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:08:11,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:08:11,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:08:11" (1/1) ... [2019-09-20 13:08:11,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:08:11" (1/1) ... [2019-09-20 13:08:11,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:08:11" (1/1) ... [2019-09-20 13:08:11,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:08:11" (1/1) ... [2019-09-20 13:08:11,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:08:11" (1/1) ... [2019-09-20 13:08:11,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:08:11" (1/1) ... [2019-09-20 13:08:11,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:08:11" (1/1) ... [2019-09-20 13:08:11,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:08:11,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:08:11,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:08:11,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:08:11,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:08:11" (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 13:08:11,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:08:11,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:08:11,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-09-20 13:08:11,676 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-09-20 13:08:11,676 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-09-20 13:08:11,676 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-09-20 13:08:11,677 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-09-20 13:08:11,677 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2019-09-20 13:08:11,677 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-09-20 13:08:11,677 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2019-09-20 13:08:11,677 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-09-20 13:08:11,678 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-09-20 13:08:11,678 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-09-20 13:08:11,678 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-09-20 13:08:11,678 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-09-20 13:08:11,679 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-09-20 13:08:11,679 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-09-20 13:08:11,679 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-09-20 13:08:11,679 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-09-20 13:08:11,679 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-09-20 13:08:11,680 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-09-20 13:08:11,680 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-09-20 13:08:11,680 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-09-20 13:08:11,680 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-09-20 13:08:11,680 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-09-20 13:08:11,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-09-20 13:08:11,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-09-20 13:08:11,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-09-20 13:08:11,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-09-20 13:08:11,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-09-20 13:08:11,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-09-20 13:08:11,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__1 [2019-09-20 13:08:11,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__2 [2019-09-20 13:08:11,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__3 [2019-09-20 13:08:11,682 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-09-20 13:08:11,683 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-09-20 13:08:11,683 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-09-20 13:08:11,683 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-09-20 13:08:11,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-09-20 13:08:11,683 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-09-20 13:08:11,683 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-09-20 13:08:11,684 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-09-20 13:08:11,684 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-09-20 13:08:11,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:08:11,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:08:11,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:08:11,684 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-09-20 13:08:11,685 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-09-20 13:08:11,685 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-09-20 13:08:11,685 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-09-20 13:08:11,685 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-09-20 13:08:11,685 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-09-20 13:08:11,685 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-09-20 13:08:11,685 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-09-20 13:08:11,686 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-09-20 13:08:11,686 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-09-20 13:08:11,686 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-09-20 13:08:11,686 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-09-20 13:08:11,686 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-09-20 13:08:11,686 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-09-20 13:08:11,687 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-09-20 13:08:11,687 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__2 [2019-09-20 13:08:11,687 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__3 [2019-09-20 13:08:11,687 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-09-20 13:08:11,687 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-09-20 13:08:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-09-20 13:08:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-09-20 13:08:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-09-20 13:08:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2019-09-20 13:08:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-09-20 13:08:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2019-09-20 13:08:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:08:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-09-20 13:08:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-09-20 13:08:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-20 13:08:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-20 13:08:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-09-20 13:08:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-20 13:08:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-20 13:08:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:08:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-20 13:08:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-09-20 13:08:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:08:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-09-20 13:08:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-09-20 13:08:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:08:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-09-20 13:08:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-09-20 13:08:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-09-20 13:08:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-09-20 13:08:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__1 [2019-09-20 13:08:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-09-20 13:08:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-09-20 13:08:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-09-20 13:08:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-09-20 13:08:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-09-20 13:08:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-09-20 13:08:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-09-20 13:08:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:08:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:08:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-20 13:08:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:08:13,053 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:08:13,054 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-20 13:08:13,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:08:13 BoogieIcfgContainer [2019-09-20 13:08:13,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:08:13,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:08:13,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:08:13,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:08:13,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:08:10" (1/3) ... [2019-09-20 13:08:13,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67458ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:08:13, skipping insertion in model container [2019-09-20 13:08:13,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:08:11" (2/3) ... [2019-09-20 13:08:13,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67458ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:08:13, skipping insertion in model container [2019-09-20 13:08:13,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:08:13" (3/3) ... [2019-09-20 13:08:13,064 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product61.cil.c [2019-09-20 13:08:13,075 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:08:13,084 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:08:13,104 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:08:13,142 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 13:08:13,143 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:08:13,144 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 13:08:13,144 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:08:13,144 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:08:13,144 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:08:13,144 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:08:13,144 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:08:13,145 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:08:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states. [2019-09-20 13:08:13,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-20 13:08:13,180 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:13,181 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 13:08:13,184 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:13,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:13,190 INFO L82 PathProgramCache]: Analyzing trace with hash -748532366, now seen corresponding path program 1 times [2019-09-20 13:08:13,192 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:13,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:13,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:13,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:13,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:08:13,599 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:08:13,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:08:13,604 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:08:13,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:08:13,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:08:13,623 INFO L87 Difference]: Start difference. First operand 206 states. Second operand 2 states. [2019-09-20 13:08:13,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:13,672 INFO L93 Difference]: Finished difference Result 322 states and 399 transitions. [2019-09-20 13:08:13,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:08:13,674 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 59 [2019-09-20 13:08:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:13,688 INFO L225 Difference]: With dead ends: 322 [2019-09-20 13:08:13,688 INFO L226 Difference]: Without dead ends: 163 [2019-09-20 13:08:13,694 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 13:08:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-09-20 13:08:13,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2019-09-20 13:08:13,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-09-20 13:08:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 193 transitions. [2019-09-20 13:08:13,761 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 193 transitions. Word has length 59 [2019-09-20 13:08:13,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:13,761 INFO L475 AbstractCegarLoop]: Abstraction has 163 states and 193 transitions. [2019-09-20 13:08:13,762 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:08:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 193 transitions. [2019-09-20 13:08:13,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-20 13:08:13,766 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:13,766 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 13:08:13,767 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:13,767 INFO L82 PathProgramCache]: Analyzing trace with hash -637468051, now seen corresponding path program 1 times [2019-09-20 13:08:13,767 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:13,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:13,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:13,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:13,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:13,959 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 13:08:13,961 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:08:13,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:08:13,963 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:08:13,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:08:13,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:08:13,964 INFO L87 Difference]: Start difference. First operand 163 states and 193 transitions. Second operand 3 states. [2019-09-20 13:08:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:14,004 INFO L93 Difference]: Finished difference Result 271 states and 321 transitions. [2019-09-20 13:08:14,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:08:14,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2019-09-20 13:08:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:14,007 INFO L225 Difference]: With dead ends: 271 [2019-09-20 13:08:14,008 INFO L226 Difference]: Without dead ends: 154 [2019-09-20 13:08:14,010 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:08:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-09-20 13:08:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2019-09-20 13:08:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-09-20 13:08:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 181 transitions. [2019-09-20 13:08:14,027 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 181 transitions. Word has length 60 [2019-09-20 13:08:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:14,028 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 181 transitions. [2019-09-20 13:08:14,028 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:08:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 181 transitions. [2019-09-20 13:08:14,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-20 13:08:14,031 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:14,031 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] [2019-09-20 13:08:14,031 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:14,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:14,032 INFO L82 PathProgramCache]: Analyzing trace with hash -733015768, now seen corresponding path program 1 times [2019-09-20 13:08:14,032 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:14,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:14,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:14,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:14,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:14,191 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 13:08:14,191 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:08:14,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-20 13:08:14,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:08:14,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:08:14,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:08:14,193 INFO L87 Difference]: Start difference. First operand 154 states and 181 transitions. Second operand 7 states. [2019-09-20 13:08:14,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:14,584 INFO L93 Difference]: Finished difference Result 280 states and 335 transitions. [2019-09-20 13:08:14,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:08:14,585 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2019-09-20 13:08:14,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:14,588 INFO L225 Difference]: With dead ends: 280 [2019-09-20 13:08:14,589 INFO L226 Difference]: Without dead ends: 154 [2019-09-20 13:08:14,590 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 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 13:08:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-09-20 13:08:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2019-09-20 13:08:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-09-20 13:08:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 180 transitions. [2019-09-20 13:08:14,613 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 180 transitions. Word has length 64 [2019-09-20 13:08:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:14,616 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 180 transitions. [2019-09-20 13:08:14,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:08:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 180 transitions. [2019-09-20 13:08:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-20 13:08:14,620 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:14,620 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] [2019-09-20 13:08:14,620 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash 330531379, now seen corresponding path program 1 times [2019-09-20 13:08:14,621 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:14,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:14,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:14,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:14,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:14,780 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 13:08:14,780 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:08:14,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:08:14,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:08:14,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:08:14,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:08:14,783 INFO L87 Difference]: Start difference. First operand 154 states and 180 transitions. Second operand 5 states. [2019-09-20 13:08:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:15,452 INFO L93 Difference]: Finished difference Result 399 states and 482 transitions. [2019-09-20 13:08:15,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:08:15,453 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2019-09-20 13:08:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:15,461 INFO L225 Difference]: With dead ends: 399 [2019-09-20 13:08:15,461 INFO L226 Difference]: Without dead ends: 273 [2019-09-20 13:08:15,465 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 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 13:08:15,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2019-09-20 13:08:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 255. [2019-09-20 13:08:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2019-09-20 13:08:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 290 transitions. [2019-09-20 13:08:15,526 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 290 transitions. Word has length 82 [2019-09-20 13:08:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:15,529 INFO L475 AbstractCegarLoop]: Abstraction has 255 states and 290 transitions. [2019-09-20 13:08:15,529 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:08:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 290 transitions. [2019-09-20 13:08:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-20 13:08:15,536 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:15,536 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] [2019-09-20 13:08:15,537 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:15,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:15,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1154984362, now seen corresponding path program 1 times [2019-09-20 13:08:15,537 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:15,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:15,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:15,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:15,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:15,680 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 13:08:15,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:08:15,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-20 13:08:15,681 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:08:15,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:08:15,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:08:15,682 INFO L87 Difference]: Start difference. First operand 255 states and 290 transitions. Second operand 7 states. [2019-09-20 13:08:16,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:16,397 INFO L93 Difference]: Finished difference Result 499 states and 583 transitions. [2019-09-20 13:08:16,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-20 13:08:16,398 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2019-09-20 13:08:16,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:16,401 INFO L225 Difference]: With dead ends: 499 [2019-09-20 13:08:16,401 INFO L226 Difference]: Without dead ends: 272 [2019-09-20 13:08:16,402 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 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 13:08:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-09-20 13:08:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 254. [2019-09-20 13:08:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2019-09-20 13:08:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 287 transitions. [2019-09-20 13:08:16,426 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 287 transitions. Word has length 96 [2019-09-20 13:08:16,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:16,427 INFO L475 AbstractCegarLoop]: Abstraction has 254 states and 287 transitions. [2019-09-20 13:08:16,427 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:08:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 287 transitions. [2019-09-20 13:08:16,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-20 13:08:16,429 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:16,430 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:08:16,430 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:16,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1590195415, now seen corresponding path program 1 times [2019-09-20 13:08:16,430 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:16,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:16,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:16,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:16,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:16,520 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 13:08:16,521 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:08:16,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:08:16,521 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:08:16,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:08:16,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:08:16,522 INFO L87 Difference]: Start difference. First operand 254 states and 287 transitions. Second operand 6 states. [2019-09-20 13:08:16,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:16,561 INFO L93 Difference]: Finished difference Result 487 states and 564 transitions. [2019-09-20 13:08:16,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:08:16,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 112 [2019-09-20 13:08:16,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:16,565 INFO L225 Difference]: With dead ends: 487 [2019-09-20 13:08:16,565 INFO L226 Difference]: Without dead ends: 261 [2019-09-20 13:08:16,566 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 13:08:16,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2019-09-20 13:08:16,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 259. [2019-09-20 13:08:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-09-20 13:08:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 292 transitions. [2019-09-20 13:08:16,587 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 292 transitions. Word has length 112 [2019-09-20 13:08:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:16,587 INFO L475 AbstractCegarLoop]: Abstraction has 259 states and 292 transitions. [2019-09-20 13:08:16,587 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:08:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 292 transitions. [2019-09-20 13:08:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-20 13:08:16,589 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:16,590 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:08:16,590 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:16,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:16,590 INFO L82 PathProgramCache]: Analyzing trace with hash -765609835, now seen corresponding path program 1 times [2019-09-20 13:08:16,591 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:16,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:16,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:16,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:16,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:16,684 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 13:08:16,684 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:08:16,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-09-20 13:08:16,685 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 13:08:16,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 13:08:16,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:08:16,686 INFO L87 Difference]: Start difference. First operand 259 states and 292 transitions. Second operand 8 states. [2019-09-20 13:08:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:16,727 INFO L93 Difference]: Finished difference Result 497 states and 575 transitions. [2019-09-20 13:08:16,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:08:16,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2019-09-20 13:08:16,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:16,730 INFO L225 Difference]: With dead ends: 497 [2019-09-20 13:08:16,730 INFO L226 Difference]: Without dead ends: 266 [2019-09-20 13:08:16,731 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 13:08:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-09-20 13:08:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2019-09-20 13:08:16,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2019-09-20 13:08:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 296 transitions. [2019-09-20 13:08:16,749 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 296 transitions. Word has length 112 [2019-09-20 13:08:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:16,749 INFO L475 AbstractCegarLoop]: Abstraction has 263 states and 296 transitions. [2019-09-20 13:08:16,750 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 13:08:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 296 transitions. [2019-09-20 13:08:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-20 13:08:16,751 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:16,751 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:08:16,752 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:16,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:16,752 INFO L82 PathProgramCache]: Analyzing trace with hash 3560180, now seen corresponding path program 1 times [2019-09-20 13:08:16,752 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:16,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:16,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:16,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:16,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:16,860 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 13:08:16,861 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:08:16,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:08:16,862 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:08:16,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:08:16,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:08:16,868 INFO L87 Difference]: Start difference. First operand 263 states and 296 transitions. Second operand 4 states. [2019-09-20 13:08:17,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:17,126 INFO L93 Difference]: Finished difference Result 754 states and 890 transitions. [2019-09-20 13:08:17,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:08:17,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2019-09-20 13:08:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:17,136 INFO L225 Difference]: With dead ends: 754 [2019-09-20 13:08:17,137 INFO L226 Difference]: Without dead ends: 519 [2019-09-20 13:08:17,138 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:08:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2019-09-20 13:08:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 510. [2019-09-20 13:08:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2019-09-20 13:08:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 591 transitions. [2019-09-20 13:08:17,175 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 591 transitions. Word has length 112 [2019-09-20 13:08:17,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:17,175 INFO L475 AbstractCegarLoop]: Abstraction has 510 states and 591 transitions. [2019-09-20 13:08:17,176 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:08:17,176 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 591 transitions. [2019-09-20 13:08:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-20 13:08:17,178 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:17,178 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:08:17,178 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:17,179 INFO L82 PathProgramCache]: Analyzing trace with hash -427651474, now seen corresponding path program 1 times [2019-09-20 13:08:17,179 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:17,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:17,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:17,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:17,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:17,397 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 13:08:17,397 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:08:17,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-09-20 13:08:17,398 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 13:08:17,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 13:08:17,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:08:17,399 INFO L87 Difference]: Start difference. First operand 510 states and 591 transitions. Second operand 9 states. [2019-09-20 13:08:18,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:18,561 INFO L93 Difference]: Finished difference Result 1335 states and 1616 transitions. [2019-09-20 13:08:18,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-20 13:08:18,562 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 116 [2019-09-20 13:08:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:18,569 INFO L225 Difference]: With dead ends: 1335 [2019-09-20 13:08:18,569 INFO L226 Difference]: Without dead ends: 926 [2019-09-20 13:08:18,571 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-09-20 13:08:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2019-09-20 13:08:18,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 850. [2019-09-20 13:08:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 850 states. [2019-09-20 13:08:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 973 transitions. [2019-09-20 13:08:18,629 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 973 transitions. Word has length 116 [2019-09-20 13:08:18,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:18,630 INFO L475 AbstractCegarLoop]: Abstraction has 850 states and 973 transitions. [2019-09-20 13:08:18,630 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 13:08:18,630 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 973 transitions. [2019-09-20 13:08:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-09-20 13:08:18,633 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:18,633 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:08:18,634 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:18,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:18,634 INFO L82 PathProgramCache]: Analyzing trace with hash -701597495, now seen corresponding path program 1 times [2019-09-20 13:08:18,634 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:18,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:18,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:18,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:18,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-09-20 13:08:18,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:08:18,900 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 13:08:18,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:19,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-20 13:08:19,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:08:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 13:08:19,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:08:19,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2019-09-20 13:08:19,414 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-20 13:08:19,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-20 13:08:19,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-20 13:08:19,415 INFO L87 Difference]: Start difference. First operand 850 states and 973 transitions. Second operand 16 states. [2019-09-20 13:08:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:20,647 INFO L93 Difference]: Finished difference Result 1867 states and 2220 transitions. [2019-09-20 13:08:20,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-20 13:08:20,649 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 193 [2019-09-20 13:08:20,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:20,656 INFO L225 Difference]: With dead ends: 1867 [2019-09-20 13:08:20,656 INFO L226 Difference]: Without dead ends: 1116 [2019-09-20 13:08:20,660 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2019-09-20 13:08:20,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2019-09-20 13:08:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 996. [2019-09-20 13:08:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 996 states. [2019-09-20 13:08:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1153 transitions. [2019-09-20 13:08:20,730 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1153 transitions. Word has length 193 [2019-09-20 13:08:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:20,731 INFO L475 AbstractCegarLoop]: Abstraction has 996 states and 1153 transitions. [2019-09-20 13:08:20,731 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-20 13:08:20,731 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1153 transitions. [2019-09-20 13:08:20,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2019-09-20 13:08:20,738 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:20,739 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, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:08:20,739 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:20,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:20,740 INFO L82 PathProgramCache]: Analyzing trace with hash 833806897, now seen corresponding path program 1 times [2019-09-20 13:08:20,740 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:20,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:20,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:20,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:20,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 77 proven. 7 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-09-20 13:08:21,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:08:21,005 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 13:08:21,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:21,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-20 13:08:21,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:08:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 239 proven. 4 refuted. 0 times theorem prover too weak. 83 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 13:08:21,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:08:21,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2019-09-20 13:08:21,568 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-20 13:08:21,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-20 13:08:21,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2019-09-20 13:08:21,569 INFO L87 Difference]: Start difference. First operand 996 states and 1153 transitions. Second operand 19 states. [2019-09-20 13:08:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:27,831 INFO L93 Difference]: Finished difference Result 3665 states and 5094 transitions. [2019-09-20 13:08:27,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-20 13:08:27,832 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 331 [2019-09-20 13:08:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:27,852 INFO L225 Difference]: With dead ends: 3665 [2019-09-20 13:08:27,852 INFO L226 Difference]: Without dead ends: 2705 [2019-09-20 13:08:27,860 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=607, Invalid=3815, Unknown=0, NotChecked=0, Total=4422 [2019-09-20 13:08:27,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2019-09-20 13:08:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1930. [2019-09-20 13:08:28,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2019-09-20 13:08:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2165 transitions. [2019-09-20 13:08:28,011 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2165 transitions. Word has length 331 [2019-09-20 13:08:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:28,012 INFO L475 AbstractCegarLoop]: Abstraction has 1930 states and 2165 transitions. [2019-09-20 13:08:28,012 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-20 13:08:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2165 transitions. [2019-09-20 13:08:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2019-09-20 13:08:28,025 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:28,026 INFO L407 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-09-20 13:08:28,026 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:28,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:28,027 INFO L82 PathProgramCache]: Analyzing trace with hash 351452787, now seen corresponding path program 1 times [2019-09-20 13:08:28,027 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:28,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:28,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:28,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:28,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 95 proven. 63 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-09-20 13:08:28,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:08:28,278 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 13:08:28,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:28,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-20 13:08:28,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:08:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 275 proven. 18 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-09-20 13:08:28,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:08:28,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2019-09-20 13:08:28,850 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-20 13:08:28,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-20 13:08:28,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2019-09-20 13:08:28,851 INFO L87 Difference]: Start difference. First operand 1930 states and 2165 transitions. Second operand 20 states. [2019-09-20 13:08:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:30,669 INFO L93 Difference]: Finished difference Result 3666 states and 4131 transitions. [2019-09-20 13:08:30,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-20 13:08:30,673 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 347 [2019-09-20 13:08:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:30,684 INFO L225 Difference]: With dead ends: 3666 [2019-09-20 13:08:30,685 INFO L226 Difference]: Without dead ends: 1934 [2019-09-20 13:08:30,690 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 352 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 13:08:30,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2019-09-20 13:08:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 1930. [2019-09-20 13:08:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2019-09-20 13:08:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2160 transitions. [2019-09-20 13:08:30,798 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2160 transitions. Word has length 347 [2019-09-20 13:08:30,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:30,799 INFO L475 AbstractCegarLoop]: Abstraction has 1930 states and 2160 transitions. [2019-09-20 13:08:30,799 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-20 13:08:30,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2160 transitions. [2019-09-20 13:08:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2019-09-20 13:08:30,809 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:30,809 INFO L407 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-09-20 13:08:30,810 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:30,810 INFO L82 PathProgramCache]: Analyzing trace with hash 483095145, now seen corresponding path program 1 times [2019-09-20 13:08:30,810 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:30,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:30,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:30,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:30,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-09-20 13:08:31,143 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:08:31,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2019-09-20 13:08:31,146 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-20 13:08:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-20 13:08:31,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:08:31,147 INFO L87 Difference]: Start difference. First operand 1930 states and 2160 transitions. Second operand 13 states. [2019-09-20 13:08:32,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:32,485 INFO L93 Difference]: Finished difference Result 3560 states and 4016 transitions. [2019-09-20 13:08:32,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-20 13:08:32,486 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 348 [2019-09-20 13:08:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:32,502 INFO L225 Difference]: With dead ends: 3560 [2019-09-20 13:08:32,502 INFO L226 Difference]: Without dead ends: 1828 [2019-09-20 13:08:32,510 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2019-09-20 13:08:32,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2019-09-20 13:08:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1799. [2019-09-20 13:08:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1799 states. [2019-09-20 13:08:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2004 transitions. [2019-09-20 13:08:32,667 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2004 transitions. Word has length 348 [2019-09-20 13:08:32,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:32,668 INFO L475 AbstractCegarLoop]: Abstraction has 1799 states and 2004 transitions. [2019-09-20 13:08:32,668 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-20 13:08:32,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2004 transitions. [2019-09-20 13:08:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2019-09-20 13:08:32,685 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:32,686 INFO L407 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-09-20 13:08:32,686 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:32,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:32,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1888350205, now seen corresponding path program 1 times [2019-09-20 13:08:32,687 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:32,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:32,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:32,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:32,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 95 proven. 44 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-09-20 13:08:33,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:08:33,017 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:08:33,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:33,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-20 13:08:33,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:08:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 202 proven. 16 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-09-20 13:08:33,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:08:33,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 14 [2019-09-20 13:08:33,513 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-20 13:08:33,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-20 13:08:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-09-20 13:08:33,514 INFO L87 Difference]: Start difference. First operand 1799 states and 2004 transitions. Second operand 14 states. [2019-09-20 13:08:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:36,023 INFO L93 Difference]: Finished difference Result 3879 states and 4677 transitions. [2019-09-20 13:08:36,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-20 13:08:36,024 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 352 [2019-09-20 13:08:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:36,043 INFO L225 Difference]: With dead ends: 3879 [2019-09-20 13:08:36,044 INFO L226 Difference]: Without dead ends: 2863 [2019-09-20 13:08:36,048 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 371 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 13:08:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2019-09-20 13:08:36,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2250. [2019-09-20 13:08:36,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2250 states. [2019-09-20 13:08:36,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 2517 transitions. [2019-09-20 13:08:36,203 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 2517 transitions. Word has length 352 [2019-09-20 13:08:36,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:36,203 INFO L475 AbstractCegarLoop]: Abstraction has 2250 states and 2517 transitions. [2019-09-20 13:08:36,204 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-20 13:08:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 2517 transitions. [2019-09-20 13:08:36,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2019-09-20 13:08:36,226 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:36,227 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-09-20 13:08:36,228 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:36,228 INFO L82 PathProgramCache]: Analyzing trace with hash 684440100, now seen corresponding path program 1 times [2019-09-20 13:08:36,228 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:36,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:36,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:36,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:36,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 115 proven. 76 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2019-09-20 13:08:36,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:08:36,669 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 13:08:36,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:36,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-20 13:08:36,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:08:37,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:08:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 399 proven. 26 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-09-20 13:08:37,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:08:37,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2019-09-20 13:08:37,199 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-20 13:08:37,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-20 13:08:37,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-09-20 13:08:37,200 INFO L87 Difference]: Start difference. First operand 2250 states and 2517 transitions. Second operand 15 states. [2019-09-20 13:08:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:39,902 INFO L93 Difference]: Finished difference Result 6143 states and 7277 transitions. [2019-09-20 13:08:39,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-20 13:08:39,903 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 425 [2019-09-20 13:08:39,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:39,927 INFO L225 Difference]: With dead ends: 6143 [2019-09-20 13:08:39,927 INFO L226 Difference]: Without dead ends: 4055 [2019-09-20 13:08:39,935 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 426 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2019-09-20 13:08:39,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2019-09-20 13:08:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 3296. [2019-09-20 13:08:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3296 states. [2019-09-20 13:08:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 3679 transitions. [2019-09-20 13:08:40,153 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 3679 transitions. Word has length 425 [2019-09-20 13:08:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:40,154 INFO L475 AbstractCegarLoop]: Abstraction has 3296 states and 3679 transitions. [2019-09-20 13:08:40,154 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-20 13:08:40,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 3679 transitions. [2019-09-20 13:08:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2019-09-20 13:08:40,167 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:08:40,168 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-09-20 13:08:40,168 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:08:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:08:40,169 INFO L82 PathProgramCache]: Analyzing trace with hash -337584218, now seen corresponding path program 1 times [2019-09-20 13:08:40,169 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:08:40,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:08:40,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:40,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:40,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:08:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 108 proven. 16 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2019-09-20 13:08:40,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:08:40,381 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 13:08:40,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:08:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:08:40,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-20 13:08:40,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:08:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2019-09-20 13:08:40,844 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:08:40,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2019-09-20 13:08:40,853 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-20 13:08:40,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-20 13:08:40,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:08:40,854 INFO L87 Difference]: Start difference. First operand 3296 states and 3679 transitions. Second operand 13 states. [2019-09-20 13:08:40,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:08:40,948 INFO L93 Difference]: Finished difference Result 3890 states and 4319 transitions. [2019-09-20 13:08:40,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 13:08:40,949 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 425 [2019-09-20 13:08:40,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:08:40,950 INFO L225 Difference]: With dead ends: 3890 [2019-09-20 13:08:40,950 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:08:40,959 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-09-20 13:08:40,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:08:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:08:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:08:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:08:40,960 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 425 [2019-09-20 13:08:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:08:40,961 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:08:40,961 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-20 13:08:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:08:40,961 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:08:40,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-20 13:08:41,928 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 98 [2019-09-20 13:08:42,395 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 104