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_spec4_product56.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:38:50,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:38:50,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:38:50,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:38:50,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:38:50,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:38:50,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:38:50,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:38:50,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:38:50,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:38:50,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:38:50,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:38:50,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:38:50,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:38:50,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:38:50,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:38:50,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:38:50,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:38:50,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:38:50,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:38:50,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:38:50,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:38:50,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:38:50,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:38:50,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:38:50,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:38:50,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:38:50,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:38:50,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:38:50,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:38:50,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:38:50,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:38:50,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:38:50,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:38:50,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:38:50,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:38:50,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:38:50,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:38:50,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:38:50,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:38:50,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:38:50,646 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 [2019-10-14 23:38:50,671 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:38:50,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:38:50,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:38:50,673 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:38:50,674 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:38:50,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:38:50,674 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:38:50,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:38:50,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:38:50,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:38:50,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:38:50,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:38:50,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:38:50,676 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:38:50,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:38:50,677 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:38:50,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:38:50,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:38:50,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:38:50,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:38:50,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:38:50,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:38:50,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:38:50,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:38:50,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:38:50,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:38:50,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:38:50,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:38:50,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:38:50,947 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:38:50,960 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:38:50,963 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:38:50,965 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:38:50,965 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:38:50,966 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2019-10-14 23:38:51,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2626548ed/24405dfee4c249e1bb6dcd6ae93c187a/FLAG281467ba6 [2019-10-14 23:38:51,662 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:38:51,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product56.cil.c [2019-10-14 23:38:51,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2626548ed/24405dfee4c249e1bb6dcd6ae93c187a/FLAG281467ba6 [2019-10-14 23:38:51,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2626548ed/24405dfee4c249e1bb6dcd6ae93c187a [2019-10-14 23:38:51,909 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:38:51,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:38:51,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:38:51,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:38:51,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:38:51,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:38:51" (1/1) ... [2019-10-14 23:38:51,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27b1071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:51, skipping insertion in model container [2019-10-14 23:38:51,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:38:51" (1/1) ... [2019-10-14 23:38:51,927 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:38:51,988 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:38:52,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:38:52,498 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:38:52,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:38:52,647 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:38:52,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:52 WrapperNode [2019-10-14 23:38:52,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:38:52,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:38:52,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:38:52,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:38:52,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:52" (1/1) ... [2019-10-14 23:38:52,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:52" (1/1) ... [2019-10-14 23:38:52,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:52" (1/1) ... [2019-10-14 23:38:52,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:52" (1/1) ... [2019-10-14 23:38:52,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:52" (1/1) ... [2019-10-14 23:38:52,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:52" (1/1) ... [2019-10-14 23:38:52,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:52" (1/1) ... [2019-10-14 23:38:52,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:38:52,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:38:52,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:38:52,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:38:52,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:52" (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 [2019-10-14 23:38:52,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:38:52,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:38:52,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-14 23:38:52,807 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-14 23:38:52,807 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-14 23:38:52,807 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-10-14 23:38:52,807 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2019-10-14 23:38:52,808 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-14 23:38:52,808 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-14 23:38:52,808 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-14 23:38:52,809 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-14 23:38:52,809 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-14 23:38:52,809 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-14 23:38:52,810 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-10-14 23:38:52,810 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-10-14 23:38:52,810 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2019-10-14 23:38:52,810 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2019-10-14 23:38:52,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-14 23:38:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-14 23:38:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-14 23:38:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-14 23:38:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-14 23:38:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-14 23:38:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-14 23:38:52,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2019-10-14 23:38:52,812 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-14 23:38:52,812 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-14 23:38:52,812 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-14 23:38:52,812 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-14 23:38:52,813 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:38:52,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-14 23:38:52,813 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-14 23:38:52,813 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-14 23:38:52,813 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-14 23:38:52,813 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-14 23:38:52,814 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-14 23:38:52,814 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-14 23:38:52,814 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-10-14 23:38:52,814 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-10-14 23:38:52,814 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-14 23:38:52,814 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-14 23:38:52,815 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-14 23:38:52,815 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-14 23:38:52,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:38:52,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:38:52,815 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-14 23:38:52,815 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-14 23:38:52,816 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-14 23:38:52,816 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-14 23:38:52,816 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-10-14 23:38:52,816 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-10-14 23:38:52,816 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-14 23:38:52,816 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-14 23:38:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-14 23:38:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-14 23:38:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-14 23:38:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2019-10-14 23:38:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2019-10-14 23:38:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2019-10-14 23:38:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-14 23:38:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-14 23:38:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-10-14 23:38:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-10-14 23:38:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-10-14 23:38:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2019-10-14 23:38:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-14 23:38:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:38:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-14 23:38:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:38:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 23:38:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-14 23:38:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:38:52,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:38:52,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:38:52,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:38:52,820 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-14 23:38:52,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:38:52,820 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-14 23:38:52,821 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-14 23:38:52,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:38:52,821 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-14 23:38:52,821 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-14 23:38:52,821 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-14 23:38:52,821 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-14 23:38:52,821 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-14 23:38:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-14 23:38:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-14 23:38:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-14 23:38:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-14 23:38:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-14 23:38:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-14 23:38:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-14 23:38:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-14 23:38:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-14 23:38:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-14 23:38:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:38:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-14 23:38:52,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:38:52,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-14 23:38:52,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:38:54,044 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:38:54,044 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 23:38:54,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:38:54 BoogieIcfgContainer [2019-10-14 23:38:54,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:38:54,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:38:54,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:38:54,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:38:54,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:38:51" (1/3) ... [2019-10-14 23:38:54,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bdb3bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:38:54, skipping insertion in model container [2019-10-14 23:38:54,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:38:52" (2/3) ... [2019-10-14 23:38:54,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bdb3bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:38:54, skipping insertion in model container [2019-10-14 23:38:54,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:38:54" (3/3) ... [2019-10-14 23:38:54,058 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product56.cil.c [2019-10-14 23:38:54,069 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:38:54,081 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:38:54,094 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:38:54,134 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:38:54,135 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:38:54,135 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:38:54,135 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:38:54,136 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:38:54,136 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:38:54,136 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:38:54,136 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:38:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2019-10-14 23:38:54,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:38:54,183 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:38:54,184 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:38:54,187 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:38:54,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:38:54,195 INFO L82 PathProgramCache]: Analyzing trace with hash -559348317, now seen corresponding path program 1 times [2019-10-14 23:38:54,206 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:38:54,206 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34190472] [2019-10-14 23:38:54,206 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:54,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:54,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:38:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:55,001 WARN L191 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:38:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:38:55,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34190472] [2019-10-14 23:38:55,131 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:38:55,132 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:38:55,132 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482987143] [2019-10-14 23:38:55,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:38:55,140 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:38:55,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:38:55,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:38:55,158 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 3 states. [2019-10-14 23:38:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:38:56,555 INFO L93 Difference]: Finished difference Result 358 states and 464 transitions. [2019-10-14 23:38:56,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:38:56,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2019-10-14 23:38:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:38:56,572 INFO L225 Difference]: With dead ends: 358 [2019-10-14 23:38:56,573 INFO L226 Difference]: Without dead ends: 193 [2019-10-14 23:38:56,578 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:38:56,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-10-14 23:38:56,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 156. [2019-10-14 23:38:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-10-14 23:38:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 184 transitions. [2019-10-14 23:38:56,677 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 184 transitions. Word has length 46 [2019-10-14 23:38:56,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:38:56,677 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 184 transitions. [2019-10-14 23:38:56,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:38:56,678 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 184 transitions. [2019-10-14 23:38:56,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:38:56,683 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:38:56,683 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:38:56,684 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:38:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:38:56,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1620740414, now seen corresponding path program 1 times [2019-10-14 23:38:56,685 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:38:56,685 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428683281] [2019-10-14 23:38:56,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:56,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:56,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:38:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:57,086 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:38:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:38:57,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428683281] [2019-10-14 23:38:57,122 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:38:57,122 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:38:57,123 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192213831] [2019-10-14 23:38:57,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:38:57,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:38:57,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:38:57,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:38:57,126 INFO L87 Difference]: Start difference. First operand 156 states and 184 transitions. Second operand 4 states. [2019-10-14 23:38:57,622 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:38:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:38:58,709 INFO L93 Difference]: Finished difference Result 281 states and 343 transitions. [2019-10-14 23:38:58,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:38:58,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-10-14 23:38:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:38:58,718 INFO L225 Difference]: With dead ends: 281 [2019-10-14 23:38:58,718 INFO L226 Difference]: Without dead ends: 177 [2019-10-14 23:38:58,720 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:38:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-10-14 23:38:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 147. [2019-10-14 23:38:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-10-14 23:38:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2019-10-14 23:38:58,763 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 47 [2019-10-14 23:38:58,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:38:58,763 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2019-10-14 23:38:58,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:38:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2019-10-14 23:38:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:38:58,766 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:38:58,766 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:38:58,766 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:38:58,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:38:58,767 INFO L82 PathProgramCache]: Analyzing trace with hash -396868600, now seen corresponding path program 1 times [2019-10-14 23:38:58,767 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:38:58,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826546536] [2019-10-14 23:38:58,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:58,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:38:58,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:38:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:59,146 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:38:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:38:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:38:59,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826546536] [2019-10-14 23:38:59,290 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:38:59,290 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 23:38:59,291 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834217953] [2019-10-14 23:38:59,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:38:59,292 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:38:59,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:38:59,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:38:59,293 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand 8 states. [2019-10-14 23:38:59,701 WARN L191 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:00,077 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:00,356 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:00,613 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:01,447 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:39:04,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:39:04,080 INFO L93 Difference]: Finished difference Result 500 states and 619 transitions. [2019-10-14 23:39:04,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:39:04,081 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2019-10-14 23:39:04,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:39:04,086 INFO L225 Difference]: With dead ends: 500 [2019-10-14 23:39:04,087 INFO L226 Difference]: Without dead ends: 377 [2019-10-14 23:39:04,089 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:39:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-10-14 23:39:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 308. [2019-10-14 23:39:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2019-10-14 23:39:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 372 transitions. [2019-10-14 23:39:04,179 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 372 transitions. Word has length 52 [2019-10-14 23:39:04,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:39:04,179 INFO L462 AbstractCegarLoop]: Abstraction has 308 states and 372 transitions. [2019-10-14 23:39:04,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:39:04,180 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 372 transitions. [2019-10-14 23:39:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 23:39:04,182 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:39:04,183 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:39:04,183 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:39:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:39:04,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1317156286, now seen corresponding path program 1 times [2019-10-14 23:39:04,184 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:39:04,184 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915283959] [2019-10-14 23:39:04,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:04,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:04,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:39:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:04,518 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:39:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:39:04,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915283959] [2019-10-14 23:39:04,631 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:39:04,631 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-14 23:39:04,632 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323100967] [2019-10-14 23:39:04,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:39:04,632 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:39:04,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:39:04,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:39:04,633 INFO L87 Difference]: Start difference. First operand 308 states and 372 transitions. Second operand 12 states. [2019-10-14 23:39:05,280 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:05,656 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:05,923 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:06,198 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:06,823 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:39:07,786 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:08,219 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:08,613 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:08,905 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-14 23:39:09,215 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:09,649 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:10,086 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:10,547 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:39:13,062 INFO L93 Difference]: Finished difference Result 1257 states and 1722 transitions. [2019-10-14 23:39:13,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:39:13,063 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-10-14 23:39:13,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:39:13,072 INFO L225 Difference]: With dead ends: 1257 [2019-10-14 23:39:13,072 INFO L226 Difference]: Without dead ends: 973 [2019-10-14 23:39:13,075 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:39:13,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2019-10-14 23:39:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 872. [2019-10-14 23:39:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2019-10-14 23:39:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1114 transitions. [2019-10-14 23:39:13,330 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1114 transitions. Word has length 57 [2019-10-14 23:39:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:39:13,331 INFO L462 AbstractCegarLoop]: Abstraction has 872 states and 1114 transitions. [2019-10-14 23:39:13,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:39:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1114 transitions. [2019-10-14 23:39:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 23:39:13,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:39:13,335 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:39:13,335 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:39:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:39:13,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1811637144, now seen corresponding path program 1 times [2019-10-14 23:39:13,338 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:39:13,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302009757] [2019-10-14 23:39:13,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:13,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:13,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:39:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:13,649 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:39:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:39:13,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302009757] [2019-10-14 23:39:13,725 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:39:13,725 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:39:13,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411785933] [2019-10-14 23:39:13,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:39:13,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:39:13,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:39:13,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:39:13,727 INFO L87 Difference]: Start difference. First operand 872 states and 1114 transitions. Second operand 6 states. [2019-10-14 23:39:14,092 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:39:16,303 INFO L93 Difference]: Finished difference Result 2053 states and 2819 transitions. [2019-10-14 23:39:16,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:39:16,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2019-10-14 23:39:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:39:16,313 INFO L225 Difference]: With dead ends: 2053 [2019-10-14 23:39:16,313 INFO L226 Difference]: Without dead ends: 1205 [2019-10-14 23:39:16,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:39:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2019-10-14 23:39:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1114. [2019-10-14 23:39:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1114 states. [2019-10-14 23:39:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1402 transitions. [2019-10-14 23:39:16,586 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1402 transitions. Word has length 61 [2019-10-14 23:39:16,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:39:16,586 INFO L462 AbstractCegarLoop]: Abstraction has 1114 states and 1402 transitions. [2019-10-14 23:39:16,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:39:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1402 transitions. [2019-10-14 23:39:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 23:39:16,590 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:39:16,590 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:39:16,591 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:39:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:39:16,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1078445760, now seen corresponding path program 1 times [2019-10-14 23:39:16,591 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:39:16,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071729610] [2019-10-14 23:39:16,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:16,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:39:16,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:39:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:16,943 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2019-10-14 23:39:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-14 23:39:17,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071729610] [2019-10-14 23:39:17,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895455316] [2019-10-14 23:39:17,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:39:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:39:17,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:39:17,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:39:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:39:17,548 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:39:17,549 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-10-14 23:39:17,549 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198778365] [2019-10-14 23:39:17,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:39:17,550 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:39:17,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:39:17,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:39:17,553 INFO L87 Difference]: Start difference. First operand 1114 states and 1402 transitions. Second operand 15 states. [2019-10-14 23:39:18,127 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:18,960 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:19,860 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-14 23:39:21,067 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:39:21,430 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:23,297 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:23,602 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:24,293 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:25,440 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:25,888 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:26,208 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:26,558 WARN L191 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:27,029 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:27,390 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:28,009 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:28,454 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2019-10-14 23:39:28,714 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-14 23:39:29,165 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-10-14 23:39:29,689 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2019-10-14 23:39:30,227 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-10-14 23:39:30,564 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 190