/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product56.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 10:18:35,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 10:18:35,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 10:18:35,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 10:18:35,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 10:18:35,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 10:18:35,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 10:18:35,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 10:18:35,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 10:18:35,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 10:18:35,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 10:18:35,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 10:18:35,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 10:18:35,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 10:18:35,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 10:18:35,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 10:18:35,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 10:18:35,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 10:18:35,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 10:18:35,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 10:18:35,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 10:18:35,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 10:18:35,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 10:18:35,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 10:18:35,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 10:18:35,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 10:18:35,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 10:18:35,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 10:18:35,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 10:18:35,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 10:18:35,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 10:18:35,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 10:18:35,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 10:18:35,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 10:18:35,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 10:18:35,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 10:18:35,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 10:18:35,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 10:18:35,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 10:18:35,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 10:18:35,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 10:18:35,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 10:18:35,643 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 10:18:35,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 10:18:35,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 10:18:35,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 10:18:35,645 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 10:18:35,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 10:18:35,645 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 10:18:35,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 10:18:35,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 10:18:35,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 10:18:35,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 10:18:35,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 10:18:35,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 10:18:35,647 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 10:18:35,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 10:18:35,647 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 10:18:35,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 10:18:35,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 10:18:35,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 10:18:35,648 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 10:18:35,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 10:18:35,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 10:18:35,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 10:18:35,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 10:18:35,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 10:18:35,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 10:18:35,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 10:18:35,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 10:18:35,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 10:18:35,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-18 10:18:35,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 10:18:36,016 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 10:18:36,019 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 10:18:36,021 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 10:18:36,021 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 10:18:36,023 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product56.cil.c [2020-08-18 10:18:36,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/852949822/615044b1c8ff4dcebb3a8079b4456ef7/FLAG6a554d694 [2020-08-18 10:18:36,640 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 10:18:36,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product56.cil.c [2020-08-18 10:18:36,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/852949822/615044b1c8ff4dcebb3a8079b4456ef7/FLAG6a554d694 [2020-08-18 10:18:36,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/852949822/615044b1c8ff4dcebb3a8079b4456ef7 [2020-08-18 10:18:36,904 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 10:18:36,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 10:18:36,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 10:18:36,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 10:18:36,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 10:18:36,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:18:36" (1/1) ... [2020-08-18 10:18:36,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43518757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:36, skipping insertion in model container [2020-08-18 10:18:36,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:18:36" (1/1) ... [2020-08-18 10:18:36,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 10:18:36,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 10:18:37,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:18:37,411 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 10:18:37,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:18:37,605 INFO L208 MainTranslator]: Completed translation [2020-08-18 10:18:37,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:37 WrapperNode [2020-08-18 10:18:37,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 10:18:37,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 10:18:37,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 10:18:37,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 10:18:37,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:37" (1/1) ... [2020-08-18 10:18:37,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:37" (1/1) ... [2020-08-18 10:18:37,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:37" (1/1) ... [2020-08-18 10:18:37,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:37" (1/1) ... [2020-08-18 10:18:37,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:37" (1/1) ... [2020-08-18 10:18:37,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:37" (1/1) ... [2020-08-18 10:18:37,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:37" (1/1) ... [2020-08-18 10:18:37,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 10:18:37,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 10:18:37,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 10:18:37,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 10:18:37,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 10:18:37,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 10:18:37,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 10:18:37,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 10:18:37,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 10:18:37,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 10:18:37,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 10:18:37,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 10:18:37,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 10:18:37,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 10:18:37,767 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 10:18:37,767 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 10:18:37,768 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 10:18:37,768 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 10:18:37,768 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 10:18:37,768 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 10:18:37,768 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 10:18:37,768 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 10:18:37,768 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 10:18:37,769 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 10:18:37,769 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 10:18:37,769 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 10:18:37,769 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 10:18:37,769 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 10:18:37,769 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 10:18:37,770 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 10:18:37,770 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 10:18:37,770 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 10:18:37,770 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 10:18:37,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 10:18:37,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 10:18:37,771 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 10:18:37,771 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 10:18:37,771 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 10:18:37,771 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 10:18:37,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 10:18:37,771 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 10:18:37,772 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 10:18:37,772 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 10:18:37,772 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 10:18:37,772 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 10:18:37,772 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 10:18:37,772 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 10:18:37,773 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 10:18:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 10:18:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 10:18:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 10:18:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 10:18:37,773 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 10:18:37,774 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 10:18:37,774 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 10:18:37,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 10:18:37,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 10:18:37,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 10:18:37,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 10:18:37,775 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 10:18:37,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 10:18:37,775 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 10:18:37,775 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 10:18:37,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 10:18:37,775 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 10:18:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 10:18:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 10:18:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 10:18:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 10:18:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 10:18:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 10:18:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 10:18:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 10:18:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 10:18:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 10:18:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 10:18:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 10:18:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 10:18:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 10:18:37,778 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 10:18:37,778 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 10:18:37,779 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 10:18:37,779 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 10:18:37,779 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 10:18:37,779 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 10:18:37,779 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 10:18:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 10:18:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 10:18:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 10:18:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 10:18:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 10:18:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 10:18:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 10:18:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 10:18:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 10:18:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 10:18:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 10:18:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 10:18:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 10:18:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 10:18:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 10:18:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 10:18:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 10:18:37,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 10:18:37,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 10:18:38,902 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 10:18:38,903 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 10:18:38,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:18:38 BoogieIcfgContainer [2020-08-18 10:18:38,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 10:18:38,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 10:18:38,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 10:18:38,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 10:18:38,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:18:36" (1/3) ... [2020-08-18 10:18:38,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127f83b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:18:38, skipping insertion in model container [2020-08-18 10:18:38,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:18:37" (2/3) ... [2020-08-18 10:18:38,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127f83b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:18:38, skipping insertion in model container [2020-08-18 10:18:38,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:18:38" (3/3) ... [2020-08-18 10:18:38,917 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product56.cil.c [2020-08-18 10:18:38,928 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 10:18:38,936 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 10:18:38,951 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 10:18:38,977 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 10:18:38,977 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 10:18:38,977 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 10:18:38,978 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 10:18:38,978 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 10:18:38,978 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 10:18:38,978 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 10:18:38,979 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 10:18:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states. [2020-08-18 10:18:39,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 10:18:39,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:39,016 INFO L422 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] [2020-08-18 10:18:39,017 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:39,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:39,023 INFO L82 PathProgramCache]: Analyzing trace with hash 733672736, now seen corresponding path program 1 times [2020-08-18 10:18:39,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:39,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130333592] [2020-08-18 10:18:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:39,747 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:39,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:39,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:39,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:39,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:39,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:39,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 10:18:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:39,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 10:18:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:18:39,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130333592] [2020-08-18 10:18:39,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:39,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 10:18:39,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091853198] [2020-08-18 10:18:39,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 10:18:39,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:39,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 10:18:39,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 10:18:39,871 INFO L87 Difference]: Start difference. First operand 196 states. Second operand 3 states. [2020-08-18 10:18:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:41,204 INFO L93 Difference]: Finished difference Result 352 states and 460 transitions. [2020-08-18 10:18:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 10:18:41,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 10:18:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:41,222 INFO L225 Difference]: With dead ends: 352 [2020-08-18 10:18:41,222 INFO L226 Difference]: Without dead ends: 190 [2020-08-18 10:18:41,227 INFO L675 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 [2020-08-18 10:18:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-18 10:18:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 153. [2020-08-18 10:18:41,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-08-18 10:18:41,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2020-08-18 10:18:41,321 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 46 [2020-08-18 10:18:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:41,322 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2020-08-18 10:18:41,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 10:18:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2020-08-18 10:18:41,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 10:18:41,326 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:41,326 INFO L422 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] [2020-08-18 10:18:41,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 10:18:41,327 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:41,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:41,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1141201306, now seen corresponding path program 1 times [2020-08-18 10:18:41,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:41,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859123936] [2020-08-18 10:18:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:41,636 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:41,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:41,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:41,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:41,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:41,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:41,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 10:18:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:41,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 10:18:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:18:41,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859123936] [2020-08-18 10:18:41,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:41,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 10:18:41,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220264903] [2020-08-18 10:18:41,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 10:18:41,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:41,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 10:18:41,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:18:41,721 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand 4 states. [2020-08-18 10:18:42,110 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:43,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:43,171 INFO L93 Difference]: Finished difference Result 275 states and 339 transitions. [2020-08-18 10:18:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 10:18:43,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 10:18:43,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:43,177 INFO L225 Difference]: With dead ends: 275 [2020-08-18 10:18:43,177 INFO L226 Difference]: Without dead ends: 174 [2020-08-18 10:18:43,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 10:18:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-18 10:18:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 144. [2020-08-18 10:18:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-18 10:18:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2020-08-18 10:18:43,229 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 47 [2020-08-18 10:18:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:43,229 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2020-08-18 10:18:43,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 10:18:43,230 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2020-08-18 10:18:43,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 10:18:43,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:43,232 INFO L422 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] [2020-08-18 10:18:43,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 10:18:43,233 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1705860394, now seen corresponding path program 1 times [2020-08-18 10:18:43,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:43,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55803312] [2020-08-18 10:18:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:43,559 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:43,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:43,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:43,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:43,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:43,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:43,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 10:18:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:43,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 10:18:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:18:43,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55803312] [2020-08-18 10:18:43,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:43,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 10:18:43,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106078510] [2020-08-18 10:18:43,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 10:18:43,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:43,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 10:18:43,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 10:18:43,676 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand 8 states. [2020-08-18 10:18:44,032 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:44,341 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:44,622 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:44,856 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:45,618 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:47,766 INFO L93 Difference]: Finished difference Result 491 states and 613 transitions. [2020-08-18 10:18:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 10:18:47,770 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-18 10:18:47,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:47,775 INFO L225 Difference]: With dead ends: 491 [2020-08-18 10:18:47,775 INFO L226 Difference]: Without dead ends: 371 [2020-08-18 10:18:47,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 10:18:47,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-08-18 10:18:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 302. [2020-08-18 10:18:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-08-18 10:18:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 368 transitions. [2020-08-18 10:18:47,855 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 368 transitions. Word has length 52 [2020-08-18 10:18:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:47,855 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 368 transitions. [2020-08-18 10:18:47,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 10:18:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 368 transitions. [2020-08-18 10:18:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 10:18:47,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:47,858 INFO L422 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] [2020-08-18 10:18:47,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 10:18:47,859 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:47,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:47,859 INFO L82 PathProgramCache]: Analyzing trace with hash -986744431, now seen corresponding path program 1 times [2020-08-18 10:18:47,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:47,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385554269] [2020-08-18 10:18:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:48,131 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:48,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:48,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:48,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:48,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:48,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:48,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 10:18:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:48,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 10:18:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:48,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 10:18:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:18:48,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385554269] [2020-08-18 10:18:48,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:48,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 10:18:48,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927892652] [2020-08-18 10:18:48,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 10:18:48,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:48,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 10:18:48,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 10:18:48,253 INFO L87 Difference]: Start difference. First operand 302 states and 368 transitions. Second operand 8 states. [2020-08-18 10:18:48,589 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:49,430 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:49,853 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:50,104 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:50,332 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:50,917 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:52,020 INFO L93 Difference]: Finished difference Result 975 states and 1267 transitions. [2020-08-18 10:18:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 10:18:52,021 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 10:18:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:52,028 INFO L225 Difference]: With dead ends: 975 [2020-08-18 10:18:52,028 INFO L226 Difference]: Without dead ends: 697 [2020-08-18 10:18:52,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 10:18:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-08-18 10:18:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 559. [2020-08-18 10:18:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-08-18 10:18:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 686 transitions. [2020-08-18 10:18:52,159 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 686 transitions. Word has length 57 [2020-08-18 10:18:52,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:52,160 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 686 transitions. [2020-08-18 10:18:52,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 10:18:52,160 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 686 transitions. [2020-08-18 10:18:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 10:18:52,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:52,166 INFO L422 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] [2020-08-18 10:18:52,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 10:18:52,167 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:52,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:52,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1925248939, now seen corresponding path program 1 times [2020-08-18 10:18:52,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:52,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143687646] [2020-08-18 10:18:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:52,454 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:52,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:52,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:52,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:52,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:52,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:52,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 10:18:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:52,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 10:18:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:52,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 10:18:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:52,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 10:18:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:18:52,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143687646] [2020-08-18 10:18:52,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:52,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 10:18:52,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334447864] [2020-08-18 10:18:52,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 10:18:52,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:52,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 10:18:52,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 10:18:52,571 INFO L87 Difference]: Start difference. First operand 559 states and 686 transitions. Second operand 9 states. [2020-08-18 10:18:52,946 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:53,888 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:54,167 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:54,396 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:55,027 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:18:55,302 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:18:56,565 INFO L93 Difference]: Finished difference Result 1553 states and 2084 transitions. [2020-08-18 10:18:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 10:18:56,566 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 10:18:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:18:56,574 INFO L225 Difference]: With dead ends: 1553 [2020-08-18 10:18:56,574 INFO L226 Difference]: Without dead ends: 1018 [2020-08-18 10:18:56,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 10:18:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2020-08-18 10:18:56,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 831. [2020-08-18 10:18:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2020-08-18 10:18:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1023 transitions. [2020-08-18 10:18:56,737 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1023 transitions. Word has length 61 [2020-08-18 10:18:56,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:18:56,738 INFO L479 AbstractCegarLoop]: Abstraction has 831 states and 1023 transitions. [2020-08-18 10:18:56,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 10:18:56,738 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1023 transitions. [2020-08-18 10:18:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 10:18:56,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:18:56,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:18:56,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 10:18:56,741 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:18:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:18:56,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1051920088, now seen corresponding path program 1 times [2020-08-18 10:18:56,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:18:56,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684661034] [2020-08-18 10:18:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:18:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,012 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:18:57,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:18:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:18:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:18:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:18:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:18:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 10:18:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 10:18:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:18:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:18:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:18:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:18:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:18:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 10:18:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 10:18:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:18:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:18:57,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684661034] [2020-08-18 10:18:57,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:18:57,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 10:18:57,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437897290] [2020-08-18 10:18:57,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 10:18:57,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:18:57,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 10:18:57,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 10:18:57,152 INFO L87 Difference]: Start difference. First operand 831 states and 1023 transitions. Second operand 9 states. [2020-08-18 10:18:58,302 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:18:58,554 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 10:18:58,829 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:18:59,101 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:19:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:19:00,419 INFO L93 Difference]: Finished difference Result 1901 states and 2517 transitions. [2020-08-18 10:19:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 10:19:00,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-08-18 10:19:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:19:00,428 INFO L225 Difference]: With dead ends: 1901 [2020-08-18 10:19:00,428 INFO L226 Difference]: Without dead ends: 1094 [2020-08-18 10:19:00,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 10:19:00,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2020-08-18 10:19:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 857. [2020-08-18 10:19:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 857 states. [2020-08-18 10:19:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1051 transitions. [2020-08-18 10:19:00,603 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1051 transitions. Word has length 89 [2020-08-18 10:19:00,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:19:00,604 INFO L479 AbstractCegarLoop]: Abstraction has 857 states and 1051 transitions. [2020-08-18 10:19:00,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 10:19:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1051 transitions. [2020-08-18 10:19:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 10:19:00,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:19:00,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:19:00,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 10:19:00,610 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:19:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:19:00,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1326679702, now seen corresponding path program 1 times [2020-08-18 10:19:00,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:19:00,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45457201] [2020-08-18 10:19:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:19:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:00,884 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:19:00,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:19:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:00,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:19:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:00,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:19:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:00,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:19:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:00,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:19:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:00,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 10:19:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:00,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 10:19:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:00,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:19:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:00,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:19:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:00,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:19:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:01,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:19:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:01,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:19:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:01,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 10:19:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:01,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 10:19:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:19:01,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45457201] [2020-08-18 10:19:01,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:19:01,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 10:19:01,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013503795] [2020-08-18 10:19:01,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 10:19:01,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:19:01,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 10:19:01,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 10:19:01,091 INFO L87 Difference]: Start difference. First operand 857 states and 1051 transitions. Second operand 11 states. [2020-08-18 10:19:01,629 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 10:19:01,875 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:19:02,111 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:19:02,940 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:19:03,224 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:19:03,488 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 10:19:04,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:19:04,900 INFO L93 Difference]: Finished difference Result 1955 states and 2636 transitions. [2020-08-18 10:19:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 10:19:04,900 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 89 [2020-08-18 10:19:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:19:04,909 INFO L225 Difference]: With dead ends: 1955 [2020-08-18 10:19:04,909 INFO L226 Difference]: Without dead ends: 1122 [2020-08-18 10:19:04,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 10:19:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2020-08-18 10:19:05,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 873. [2020-08-18 10:19:05,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2020-08-18 10:19:05,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1067 transitions. [2020-08-18 10:19:05,088 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1067 transitions. Word has length 89 [2020-08-18 10:19:05,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:19:05,088 INFO L479 AbstractCegarLoop]: Abstraction has 873 states and 1067 transitions. [2020-08-18 10:19:05,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 10:19:05,088 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1067 transitions. [2020-08-18 10:19:05,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 10:19:05,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:19:05,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:19:05,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 10:19:05,091 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:19:05,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:19:05,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1017987339, now seen corresponding path program 1 times [2020-08-18 10:19:05,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:19:05,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664173474] [2020-08-18 10:19:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:19:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,345 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 10:19:05,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:19:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 10:19:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 10:19:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 10:19:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 10:19:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 10:19:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 10:19:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:19:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:19:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 10:19:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 10:19:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 10:19:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 10:19:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 10:19:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:19:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:19:05,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664173474] [2020-08-18 10:19:05,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:19:05,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 10:19:05,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746648493] [2020-08-18 10:19:05,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 10:19:05,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:19:05,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 10:19:05,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 10:19:05,496 INFO L87 Difference]: Start difference. First operand 873 states and 1067 transitions. Second operand 7 states. [2020-08-18 10:19:05,822 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:19:06,335 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 10:19:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:19:09,271 INFO L93 Difference]: Finished difference Result 2923 states and 3961 transitions. [2020-08-18 10:19:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 10:19:09,271 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 89 [2020-08-18 10:19:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:19:09,288 INFO L225 Difference]: With dead ends: 2923 [2020-08-18 10:19:09,288 INFO L226 Difference]: Without dead ends: 2074 [2020-08-18 10:19:09,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-18 10:19:09,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2020-08-18 10:19:09,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1751. [2020-08-18 10:19:09,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1751 states. [2020-08-18 10:19:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2157 transitions. [2020-08-18 10:19:09,635 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2157 transitions. Word has length 89 [2020-08-18 10:19:09,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:19:09,636 INFO L479 AbstractCegarLoop]: Abstraction has 1751 states and 2157 transitions. [2020-08-18 10:19:09,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 10:19:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2157 transitions. [2020-08-18 10:19:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 10:19:09,639 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:19:09,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:19:09,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 10:19:09,640 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:19:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:19:09,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1174397627, now seen corresponding path program 1 times [2020-08-18 10:19:09,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:19:09,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480160409] [2020-08-18 10:19:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:19:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 10:19:09,722 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 10:19:09,722 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 10:19:09,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 10:19:09,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:19:09 BoogieIcfgContainer [2020-08-18 10:19:09,770 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 10:19:09,772 INFO L168 Benchmark]: Toolchain (without parser) took 32866.31 ms. Allocated memory was 144.2 MB in the beginning and 684.2 MB in the end (delta: 540.0 MB). Free memory was 98.9 MB in the beginning and 274.4 MB in the end (delta: -175.6 MB). Peak memory consumption was 364.5 MB. Max. memory is 7.1 GB. [2020-08-18 10:19:09,773 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 144.2 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 10:19:09,780 INFO L168 Benchmark]: CACSL2BoogieTranslator took 698.43 ms. Allocated memory was 144.2 MB in the beginning and 200.3 MB in the end (delta: 56.1 MB). Free memory was 98.7 MB in the beginning and 163.6 MB in the end (delta: -64.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-08-18 10:19:09,786 INFO L168 Benchmark]: Boogie Preprocessor took 89.85 ms. Allocated memory is still 200.3 MB. Free memory was 163.6 MB in the beginning and 159.3 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. [2020-08-18 10:19:09,789 INFO L168 Benchmark]: RCFGBuilder took 1211.90 ms. Allocated memory was 200.3 MB in the beginning and 228.1 MB in the end (delta: 27.8 MB). Free memory was 159.3 MB in the beginning and 185.7 MB in the end (delta: -26.5 MB). Peak memory consumption was 84.5 MB. Max. memory is 7.1 GB. [2020-08-18 10:19:09,790 INFO L168 Benchmark]: TraceAbstraction took 30860.48 ms. Allocated memory was 228.1 MB in the beginning and 684.2 MB in the end (delta: 456.1 MB). Free memory was 184.3 MB in the beginning and 274.4 MB in the end (delta: -90.1 MB). Peak memory consumption was 366.0 MB. Max. memory is 7.1 GB. [2020-08-18 10:19:09,796 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 144.2 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 698.43 ms. Allocated memory was 144.2 MB in the beginning and 200.3 MB in the end (delta: 56.1 MB). Free memory was 98.7 MB in the beginning and 163.6 MB in the end (delta: -64.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 89.85 ms. Allocated memory is still 200.3 MB. Free memory was 163.6 MB in the beginning and 159.3 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1211.90 ms. Allocated memory was 200.3 MB in the beginning and 228.1 MB in the end (delta: 27.8 MB). Free memory was 159.3 MB in the beginning and 185.7 MB in the end (delta: -26.5 MB). Peak memory consumption was 84.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30860.48 ms. Allocated memory was 228.1 MB in the beginning and 684.2 MB in the end (delta: 456.1 MB). Free memory was 184.3 MB in the beginning and 274.4 MB in the end (delta: -90.1 MB). Peak memory consumption was 366.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 806]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L209] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L490] int pumpRunning = 0; [L491] int systemActive = 1; [L811] int cleanupTimeShifts = 4; [L908] int waterLevel = 1; [L909] int methaneLevelCritical = 0; [L884] int retValue_acc ; [L885] int tmp ; [L889] FCALL select_helpers() [L890] FCALL select_features() [L891] CALL, EXPR valid_product() [L766] int retValue_acc ; [L769] retValue_acc = 1 [L770] return (retValue_acc); [L891] RET, EXPR valid_product() [L891] tmp = valid_product() [L893] COND TRUE \read(tmp) [L895] FCALL setup() [L896] CALL runTest() [L878] CALL test() [L413] int splverifierCounter ; [L414] int tmp ; [L415] int tmp___0 ; [L416] int tmp___1 ; [L417] int tmp___2 ; [L420] splverifierCounter = 0 [L422] COND TRUE 1 [L424] COND TRUE splverifierCounter < 4 [L430] tmp = __VERIFIER_nondet_int() [L432] COND TRUE \read(tmp) [L434] CALL waterRise() [L926] COND TRUE waterLevel < 2 [L927] waterLevel = waterLevel + 1 [L434] RET waterRise() [L440] tmp___0 = __VERIFIER_nondet_int() [L442] COND TRUE \read(tmp___0) [L444] CALL changeMethaneLevel() [L938] COND FALSE !(\read(methaneLevelCritical)) [L941] methaneLevelCritical = 1 [L444] RET changeMethaneLevel() [L450] tmp___2 = __VERIFIER_nondet_int() [L452] COND FALSE !(\read(tmp___2)) [L458] tmp___1 = __VERIFIER_nondet_int() [L460] COND FALSE !(\read(tmp___1)) [L469] CALL timeShift() [L498] COND FALSE !(\read(pumpRunning)) [L505] COND TRUE \read(systemActive) [L507] CALL processEnvironment() [L579] int tmp ; [L582] COND FALSE !(\read(pumpRunning)) [L597] CALL processEnvironment__wrappee__lowWaterSensor() [L553] int tmp ; [L556] COND FALSE !(\read(pumpRunning)) [L571] CALL processEnvironment__wrappee__highWaterSensor() [L527] int tmp ; [L530] COND TRUE ! pumpRunning [L532] CALL, EXPR isHighWaterLevel() [L676] int retValue_acc ; [L677] int tmp ; [L678] int tmp___0 ; [L682] CALL, EXPR isHighWaterSensorDry() [L988] int retValue_acc ; [L991] COND FALSE !(waterLevel < 2) [L995] retValue_acc = 0 [L996] return (retValue_acc); [L682] RET, EXPR isHighWaterSensorDry() [L682] tmp = isHighWaterSensorDry() [L684] COND FALSE !(\read(tmp)) [L687] tmp___0 = 1 [L689] retValue_acc = tmp___0 [L690] return (retValue_acc); [L532] RET, EXPR isHighWaterLevel() [L532] tmp = isHighWaterLevel() [L534] COND TRUE \read(tmp) [L536] CALL activatePump() [L607] pumpRunning = 1 [L536] RET activatePump() [L571] RET processEnvironment__wrappee__highWaterSensor() [L597] RET processEnvironment__wrappee__lowWaterSensor() [L507] RET processEnvironment() [L513] CALL __utac_acc__Specification1_spec__1() [L777] int tmp ; [L778] int tmp___0 ; [L782] CALL, EXPR isMethaneLevelCritical() [L947] int retValue_acc ; [L950] retValue_acc = methaneLevelCritical [L951] return (retValue_acc); [L782] RET, EXPR isMethaneLevelCritical() [L782] tmp = isMethaneLevelCritical() [L784] COND TRUE \read(tmp) [L786] CALL, EXPR isPumpRunning() [L631] int retValue_acc ; [L634] retValue_acc = pumpRunning [L635] return (retValue_acc); [L786] RET, EXPR isPumpRunning() [L786] tmp___0 = isPumpRunning() [L788] COND TRUE \read(tmp___0) [L790] CALL __automaton_fail() [L806] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 43 procedures, 255 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30.7s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 25.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1134 SDtfs, 2314 SDslu, 1166 SDs, 0 SdLazy, 5911 SolverSat, 1571 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1751occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 1270 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 623 NumberOfCodeBlocks, 623 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 522 ConstructedInterpolants, 0 QuantifiedInterpolants, 159558 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...