/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 true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec2_product33.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:10:06,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:10:06,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:10:06,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:10:06,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:10:06,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:10:06,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:10:06,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:10:06,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:10:06,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:10:06,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:10:06,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:10:06,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:10:06,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:10:06,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:10:06,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:10:06,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:10:06,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:10:06,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:10:06,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:10:06,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:10:06,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:10:06,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:10:06,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:10:06,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:10:06,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:10:06,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:10:06,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:10:06,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:10:06,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 21:10:06,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:10:06,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:10:06,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:10:06,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:10:06,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:10:06,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:10:06,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:10:06,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:10:06,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:10:06,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:10:06,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:10:06,637 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 [2020-08-21 21:10:06,659 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:10:06,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:10:06,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:10:06,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:10:06,661 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:10:06,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:10:06,662 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:10:06,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:10:06,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:10:06,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:10:06,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:10:06,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:10:06,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:10:06,663 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:10:06,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:10:06,663 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:10:06,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:10:06,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:10:06,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:10:06,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:10:06,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:10:06,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:10:06,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:10:06,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:10:06,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:10:06,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:10:06,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:10:06,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:10:06,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:10:06,666 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:10:06,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:10:06,980 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:10:06,984 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:10:06,986 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:10:06,986 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:10:06,987 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product33.cil.c [2020-08-21 21:10:07,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f7fbd9a8/13d222abc5e740ef8180943018e3f1f7/FLAGc75e70f10 [2020-08-21 21:10:07,605 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:10:07,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec2_product33.cil.c [2020-08-21 21:10:07,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f7fbd9a8/13d222abc5e740ef8180943018e3f1f7/FLAGc75e70f10 [2020-08-21 21:10:07,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f7fbd9a8/13d222abc5e740ef8180943018e3f1f7 [2020-08-21 21:10:07,914 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:10:07,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:10:07,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:10:07,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:10:07,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:10:07,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:10:07" (1/1) ... [2020-08-21 21:10:07,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@288b8053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:10:07, skipping insertion in model container [2020-08-21 21:10:07,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:10:07" (1/1) ... [2020-08-21 21:10:07,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:10:07,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:10:08,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:10:08,448 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:10:08,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:10:08,553 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:10:08,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:10:08 WrapperNode [2020-08-21 21:10:08,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:10:08,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:10:08,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:10:08,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:10:08,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:10:08" (1/1) ... [2020-08-21 21:10:08,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:10:08" (1/1) ... [2020-08-21 21:10:08,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:10:08" (1/1) ... [2020-08-21 21:10:08,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:10:08" (1/1) ... [2020-08-21 21:10:08,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:10:08" (1/1) ... [2020-08-21 21:10:08,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:10:08" (1/1) ... [2020-08-21 21:10:08,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:10:08" (1/1) ... [2020-08-21 21:10:08,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:10:08,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:10:08,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:10:08,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:10:08,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:10:08" (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 [2020-08-21 21:10:08,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:10:08,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:10:08,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 21:10:08,710 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 21:10:08,710 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 21:10:08,710 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 21:10:08,711 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 21:10:08,711 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 21:10:08,711 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 21:10:08,711 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 21:10:08,711 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 21:10:08,711 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 21:10:08,711 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 21:10:08,712 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 21:10:08,712 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 21:10:08,712 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 21:10:08,712 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 21:10:08,712 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 21:10:08,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:10:08,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 21:10:08,713 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 21:10:08,713 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 21:10:08,713 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 21:10:08,713 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 21:10:08,713 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 21:10:08,714 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 21:10:08,714 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 21:10:08,714 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 21:10:08,714 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 21:10:08,714 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 21:10:08,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 21:10:08,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 21:10:08,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 21:10:08,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 21:10:08,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 21:10:08,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 21:10:08,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2020-08-21 21:10:08,716 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2020-08-21 21:10:08,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:10:08,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:10:08,716 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 21:10:08,716 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 21:10:08,716 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 21:10:08,716 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 21:10:08,717 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 21:10:08,717 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 21:10:08,717 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 21:10:08,717 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 21:10:08,717 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 21:10:08,717 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 21:10:08,718 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 21:10:08,718 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 21:10:08,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 21:10:08,718 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 21:10:08,718 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 21:10:08,718 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 21:10:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 21:10:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 21:10:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2020-08-21 21:10:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 21:10:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 21:10:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:10:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 21:10:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 21:10:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 21:10:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 21:10:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2020-08-21 21:10:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 21:10:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 21:10:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 21:10:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 21:10:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 21:10:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 21:10:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 21:10:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 21:10:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 21:10:08,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 21:10:08,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 21:10:08,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 21:10:08,722 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 21:10:08,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:10:08,722 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 21:10:08,723 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 21:10:08,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 21:10:08,723 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 21:10:08,723 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 21:10:08,723 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 21:10:08,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:10:08,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 21:10:08,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:10:09,832 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:10:09,832 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 21:10:09,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:10:09 BoogieIcfgContainer [2020-08-21 21:10:09,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:10:09,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:10:09,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:10:09,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:10:09,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:10:07" (1/3) ... [2020-08-21 21:10:09,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b79afc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:10:09, skipping insertion in model container [2020-08-21 21:10:09,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:10:08" (2/3) ... [2020-08-21 21:10:09,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b79afc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:10:09, skipping insertion in model container [2020-08-21 21:10:09,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:10:09" (3/3) ... [2020-08-21 21:10:09,846 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product33.cil.c [2020-08-21 21:10:09,857 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:10:09,865 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:10:09,880 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:10:09,905 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:10:09,905 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:10:09,906 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:10:09,906 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:10:09,906 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:10:09,906 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:10:09,907 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:10:09,907 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:10:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states. [2020-08-21 21:10:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 21:10:09,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:10:09,945 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] [2020-08-21 21:10:09,946 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:10:09,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:10:09,952 INFO L82 PathProgramCache]: Analyzing trace with hash -884456721, now seen corresponding path program 1 times [2020-08-21 21:10:09,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:10:09,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694907693] [2020-08-21 21:10:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:10:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:10,684 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:10:10,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:10:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:10,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:10:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:10,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:10:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:10,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:10:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:10,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:10:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:10,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:10:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:10,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 21:10:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:10,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 21:10:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:10:10,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694907693] [2020-08-21 21:10:10,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:10:10,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:10:10,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212012701] [2020-08-21 21:10:10,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:10:10,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:10:10,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:10:10,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:10:10,879 INFO L87 Difference]: Start difference. First operand 156 states. Second operand 4 states. [2020-08-21 21:10:11,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:10:11,854 INFO L93 Difference]: Finished difference Result 248 states and 328 transitions. [2020-08-21 21:10:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 21:10:11,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-21 21:10:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:10:11,880 INFO L225 Difference]: With dead ends: 248 [2020-08-21 21:10:11,881 INFO L226 Difference]: Without dead ends: 139 [2020-08-21 21:10:11,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:10:11,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-21 21:10:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 110. [2020-08-21 21:10:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-21 21:10:11,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2020-08-21 21:10:11,976 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 51 [2020-08-21 21:10:11,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:10:11,976 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2020-08-21 21:10:11,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:10:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2020-08-21 21:10:11,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 21:10:11,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:10:11,980 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] [2020-08-21 21:10:11,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:10:11,980 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:10:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:10:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash -101366549, now seen corresponding path program 1 times [2020-08-21 21:10:11,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:10:11,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823713504] [2020-08-21 21:10:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:10:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:12,285 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:10:12,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:10:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:12,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:10:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:12,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:10:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:12,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:10:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:12,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:10:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:12,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:10:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:12,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:10:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:12,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 21:10:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:10:12,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823713504] [2020-08-21 21:10:12,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:10:12,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:10:12,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824481613] [2020-08-21 21:10:12,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:10:12,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:10:12,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:10:12,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:10:12,342 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand 5 states. [2020-08-21 21:10:12,898 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:10:13,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:10:13,607 INFO L93 Difference]: Finished difference Result 193 states and 239 transitions. [2020-08-21 21:10:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:10:13,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-08-21 21:10:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:10:13,610 INFO L225 Difference]: With dead ends: 193 [2020-08-21 21:10:13,611 INFO L226 Difference]: Without dead ends: 129 [2020-08-21 21:10:13,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:10:13,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-21 21:10:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-08-21 21:10:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 21:10:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2020-08-21 21:10:13,661 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 52 [2020-08-21 21:10:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:10:13,661 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2020-08-21 21:10:13,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:10:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2020-08-21 21:10:13,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 21:10:13,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:10:13,674 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] [2020-08-21 21:10:13,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:10:13,675 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:10:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:10:13,675 INFO L82 PathProgramCache]: Analyzing trace with hash -388267202, now seen corresponding path program 1 times [2020-08-21 21:10:13,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:10:13,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388276476] [2020-08-21 21:10:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:10:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:14,067 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:10:14,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:10:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:14,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:10:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:14,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:10:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:14,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:10:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:14,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:10:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:14,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:10:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:14,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 21:10:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:14,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 21:10:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:10:14,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388276476] [2020-08-21 21:10:14,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:10:14,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 21:10:14,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488932703] [2020-08-21 21:10:14,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:10:14,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:10:14,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:10:14,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:10:14,233 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand 9 states. [2020-08-21 21:10:14,628 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:10:14,918 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:10:15,185 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:10:15,468 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:10:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:10:16,474 INFO L93 Difference]: Finished difference Result 202 states and 254 transitions. [2020-08-21 21:10:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:10:16,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-08-21 21:10:16,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:10:16,477 INFO L225 Difference]: With dead ends: 202 [2020-08-21 21:10:16,478 INFO L226 Difference]: Without dead ends: 129 [2020-08-21 21:10:16,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:10:16,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-21 21:10:16,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-08-21 21:10:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 21:10:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2020-08-21 21:10:16,518 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 56 [2020-08-21 21:10:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:10:16,518 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2020-08-21 21:10:16,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:10:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2020-08-21 21:10:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-21 21:10:16,520 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:10:16,520 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] [2020-08-21 21:10:16,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:10:16,520 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:10:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:10:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1251165603, now seen corresponding path program 1 times [2020-08-21 21:10:16,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:10:16,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959433209] [2020-08-21 21:10:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:10:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:16,785 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:10:16,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:10:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:16,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:10:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:16,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:10:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:16,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:10:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:16,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:10:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:16,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:10:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:16,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:10:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:16,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:10:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:16,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 21:10:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:16,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 21:10:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:10:16,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959433209] [2020-08-21 21:10:16,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:10:16,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 21:10:16,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273398487] [2020-08-21 21:10:16,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:10:16,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:10:16,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:10:16,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:10:16,892 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 7 states. [2020-08-21 21:10:17,267 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:10:18,481 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:10:18,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:10:18,969 INFO L93 Difference]: Finished difference Result 287 states and 364 transitions. [2020-08-21 21:10:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 21:10:18,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-08-21 21:10:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:10:18,973 INFO L225 Difference]: With dead ends: 287 [2020-08-21 21:10:18,974 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 21:10:18,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:10:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 21:10:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 168. [2020-08-21 21:10:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 21:10:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 195 transitions. [2020-08-21 21:10:19,016 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 195 transitions. Word has length 64 [2020-08-21 21:10:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:10:19,016 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 195 transitions. [2020-08-21 21:10:19,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:10:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 195 transitions. [2020-08-21 21:10:19,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 21:10:19,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:10:19,018 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] [2020-08-21 21:10:19,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:10:19,019 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:10:19,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:10:19,019 INFO L82 PathProgramCache]: Analyzing trace with hash 155242328, now seen corresponding path program 1 times [2020-08-21 21:10:19,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:10:19,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567308580] [2020-08-21 21:10:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:10:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:19,330 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:10:19,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:10:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:19,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:10:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:19,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:10:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:19,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:10:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:19,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:10:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:19,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:10:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:19,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:10:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:19,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:10:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:19,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:10:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:19,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:10:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:19,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 21:10:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:19,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 21:10:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:10:19,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567308580] [2020-08-21 21:10:19,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:10:19,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 21:10:19,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477954365] [2020-08-21 21:10:19,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:10:19,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:10:19,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:10:19,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:10:19,478 INFO L87 Difference]: Start difference. First operand 168 states and 195 transitions. Second operand 9 states. [2020-08-21 21:10:19,879 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:10:21,037 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:10:21,319 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:10:21,584 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:10:21,811 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:10:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:10:22,650 INFO L93 Difference]: Finished difference Result 495 states and 636 transitions. [2020-08-21 21:10:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 21:10:22,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-08-21 21:10:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:10:22,656 INFO L225 Difference]: With dead ends: 495 [2020-08-21 21:10:22,656 INFO L226 Difference]: Without dead ends: 355 [2020-08-21 21:10:22,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-21 21:10:22,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-08-21 21:10:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 284. [2020-08-21 21:10:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-21 21:10:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 330 transitions. [2020-08-21 21:10:22,729 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 330 transitions. Word has length 78 [2020-08-21 21:10:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:10:22,730 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 330 transitions. [2020-08-21 21:10:22,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:10:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 330 transitions. [2020-08-21 21:10:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 21:10:22,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:10:22,732 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] [2020-08-21 21:10:22,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:10:22,733 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:10:22,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:10:22,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1734675892, now seen corresponding path program 1 times [2020-08-21 21:10:22,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:10:22,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835292569] [2020-08-21 21:10:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:10:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,144 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:10:23,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:10:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:10:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:10:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:10:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:10:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:10:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 21:10:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 21:10:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:10:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:10:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:10:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 21:10:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 21:10:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:10:23,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835292569] [2020-08-21 21:10:23,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:10:23,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 21:10:23,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887438285] [2020-08-21 21:10:23,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:10:23,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:10:23,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:10:23,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:10:23,262 INFO L87 Difference]: Start difference. First operand 284 states and 330 transitions. Second operand 10 states. [2020-08-21 21:10:23,676 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:10:24,734 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:10:24,961 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:10:25,219 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:10:25,496 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:10:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:10:26,228 INFO L93 Difference]: Finished difference Result 646 states and 813 transitions. [2020-08-21 21:10:26,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 21:10:26,228 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-08-21 21:10:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:10:26,237 INFO L225 Difference]: With dead ends: 646 [2020-08-21 21:10:26,238 INFO L226 Difference]: Without dead ends: 390 [2020-08-21 21:10:26,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2020-08-21 21:10:26,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-21 21:10:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 283. [2020-08-21 21:10:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-08-21 21:10:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 327 transitions. [2020-08-21 21:10:26,335 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 327 transitions. Word has length 82 [2020-08-21 21:10:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:10:26,338 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 327 transitions. [2020-08-21 21:10:26,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:10:26,339 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 327 transitions. [2020-08-21 21:10:26,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 21:10:26,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:10:26,342 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] [2020-08-21 21:10:26,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:10:26,342 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:10:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:10:26,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1892436078, now seen corresponding path program 1 times [2020-08-21 21:10:26,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:10:26,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754199207] [2020-08-21 21:10:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:10:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,594 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:10:26,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:10:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:10:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:10:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:10:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:10:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:10:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 21:10:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 21:10:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:10:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:10:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:10:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-21 21:10:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 21:10:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:10:26,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754199207] [2020-08-21 21:10:26,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:10:26,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 21:10:26,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663345744] [2020-08-21 21:10:26,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:10:26,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:10:26,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:10:26,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:10:26,721 INFO L87 Difference]: Start difference. First operand 283 states and 327 transitions. Second operand 10 states. [2020-08-21 21:10:27,566 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:10:27,826 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-08-21 21:10:28,068 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:10:28,298 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:10:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:10:29,006 INFO L93 Difference]: Finished difference Result 649 states and 823 transitions. [2020-08-21 21:10:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 21:10:29,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-08-21 21:10:29,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:10:29,010 INFO L225 Difference]: With dead ends: 649 [2020-08-21 21:10:29,010 INFO L226 Difference]: Without dead ends: 394 [2020-08-21 21:10:29,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-08-21 21:10:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-08-21 21:10:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 293. [2020-08-21 21:10:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-08-21 21:10:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 337 transitions. [2020-08-21 21:10:29,068 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 337 transitions. Word has length 83 [2020-08-21 21:10:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:10:29,069 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 337 transitions. [2020-08-21 21:10:29,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:10:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 337 transitions. [2020-08-21 21:10:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 21:10:29,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:10:29,071 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] [2020-08-21 21:10:29,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:10:29,071 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:10:29,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:10:29,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1016327824, now seen corresponding path program 1 times [2020-08-21 21:10:29,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:10:29,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862244518] [2020-08-21 21:10:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:10:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,360 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:10:29,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:10:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:10:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:10:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:10:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:10:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:10:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 21:10:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 21:10:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:10:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:10:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:10:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-21 21:10:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 21:10:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:10:29,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862244518] [2020-08-21 21:10:29,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:10:29,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 21:10:29,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760437720] [2020-08-21 21:10:29,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 21:10:29,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:10:29,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 21:10:29,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:10:29,506 INFO L87 Difference]: Start difference. First operand 293 states and 337 transitions. Second operand 12 states. [2020-08-21 21:10:29,979 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:10:30,217 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:10:30,463 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:10:31,125 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:10:31,397 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:10:31,640 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:10:32,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:10:32,533 INFO L93 Difference]: Finished difference Result 673 states and 863 transitions. [2020-08-21 21:10:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 21:10:32,535 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-08-21 21:10:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:10:32,539 INFO L225 Difference]: With dead ends: 673 [2020-08-21 21:10:32,540 INFO L226 Difference]: Without dead ends: 408 [2020-08-21 21:10:32,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-08-21 21:10:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-08-21 21:10:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 301. [2020-08-21 21:10:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-08-21 21:10:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 345 transitions. [2020-08-21 21:10:32,606 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 345 transitions. Word has length 83 [2020-08-21 21:10:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:10:32,606 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 345 transitions. [2020-08-21 21:10:32,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 21:10:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 345 transitions. [2020-08-21 21:10:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 21:10:32,608 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:10:32,608 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] [2020-08-21 21:10:32,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:10:32,609 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:10:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:10:32,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1094962545, now seen corresponding path program 1 times [2020-08-21 21:10:32,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:10:32,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331501813] [2020-08-21 21:10:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:10:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:32,896 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:10:32,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:10:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:32,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:10:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:32,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:10:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:32,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:10:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:32,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:10:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:32,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:10:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:32,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 21:10:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:32,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 21:10:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:32,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:10:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:32,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:10:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:33,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:10:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:33,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-21 21:10:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:33,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 21:10:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:10:33,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331501813] [2020-08-21 21:10:33,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:10:33,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:10:33,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987961477] [2020-08-21 21:10:33,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:10:33,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:10:33,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:10:33,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:10:33,022 INFO L87 Difference]: Start difference. First operand 301 states and 345 transitions. Second operand 8 states. [2020-08-21 21:10:33,360 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:10:33,877 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:10:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:10:35,696 INFO L93 Difference]: Finished difference Result 972 states and 1282 transitions. [2020-08-21 21:10:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 21:10:35,697 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-08-21 21:10:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:10:35,703 INFO L225 Difference]: With dead ends: 972 [2020-08-21 21:10:35,703 INFO L226 Difference]: Without dead ends: 699 [2020-08-21 21:10:35,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2020-08-21 21:10:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-08-21 21:10:35,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 567. [2020-08-21 21:10:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-08-21 21:10:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 673 transitions. [2020-08-21 21:10:35,818 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 673 transitions. Word has length 83 [2020-08-21 21:10:35,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:10:35,818 INFO L479 AbstractCegarLoop]: Abstraction has 567 states and 673 transitions. [2020-08-21 21:10:35,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:10:35,819 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 673 transitions. [2020-08-21 21:10:35,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-21 21:10:35,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:10:35,820 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] [2020-08-21 21:10:35,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:10:35,821 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:10:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:10:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1057623401, now seen corresponding path program 1 times [2020-08-21 21:10:35,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:10:35,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413444084] [2020-08-21 21:10:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:10:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,102 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:10:36,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:10:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:10:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:10:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:10:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:10:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:10:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 21:10:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 21:10:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 21:10:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:10:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:10:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:10:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 21:10:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-21 21:10:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:10:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:10:36,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413444084] [2020-08-21 21:10:36,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:10:36,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:10:36,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805740069] [2020-08-21 21:10:36,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:10:36,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:10:36,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:10:36,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:10:36,266 INFO L87 Difference]: Start difference. First operand 567 states and 673 transitions. Second operand 8 states. [2020-08-21 21:10:36,859 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:10:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:10:39,036 INFO L93 Difference]: Finished difference Result 1114 states and 1455 transitions. [2020-08-21 21:10:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 21:10:39,037 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2020-08-21 21:10:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:10:39,045 INFO L225 Difference]: With dead ends: 1114 [2020-08-21 21:10:39,045 INFO L226 Difference]: Without dead ends: 1111 [2020-08-21 21:10:39,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2020-08-21 21:10:39,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2020-08-21 21:10:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 919. [2020-08-21 21:10:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2020-08-21 21:10:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1098 transitions. [2020-08-21 21:10:39,318 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1098 transitions. Word has length 87 [2020-08-21 21:10:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:10:39,318 INFO L479 AbstractCegarLoop]: Abstraction has 919 states and 1098 transitions. [2020-08-21 21:10:39,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:10:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1098 transitions. [2020-08-21 21:10:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-08-21 21:10:39,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:10:39,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:10:39,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:10:39,328 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:10:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:10:39,329 INFO L82 PathProgramCache]: Analyzing trace with hash -2007066912, now seen corresponding path program 1 times [2020-08-21 21:10:39,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:10:39,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500683002] [2020-08-21 21:10:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:10:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:10:39,441 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:10:39,441 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:10:39,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:10:39,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:10:39 BoogieIcfgContainer [2020-08-21 21:10:39,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:10:39,500 INFO L168 Benchmark]: Toolchain (without parser) took 31581.76 ms. Allocated memory was 146.3 MB in the beginning and 591.4 MB in the end (delta: 445.1 MB). Free memory was 101.5 MB in the beginning and 406.1 MB in the end (delta: -304.6 MB). Peak memory consumption was 140.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:10:39,501 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 21:10:39,507 INFO L168 Benchmark]: CACSL2BoogieTranslator took 636.13 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 101.3 MB in the beginning and 170.8 MB in the end (delta: -69.5 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:10:39,508 INFO L168 Benchmark]: Boogie Preprocessor took 88.18 ms. Allocated memory is still 203.4 MB. Free memory was 170.8 MB in the beginning and 166.4 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 7.1 GB. [2020-08-21 21:10:39,509 INFO L168 Benchmark]: RCFGBuilder took 1195.12 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 166.4 MB in the beginning and 199.0 MB in the end (delta: -32.7 MB). Peak memory consumption was 84.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:10:39,511 INFO L168 Benchmark]: TraceAbstraction took 29655.96 ms. Allocated memory was 235.4 MB in the beginning and 591.4 MB in the end (delta: 356.0 MB). Free memory was 197.6 MB in the beginning and 406.1 MB in the end (delta: -208.5 MB). Peak memory consumption was 147.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:10:39,519 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 636.13 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 101.3 MB in the beginning and 170.8 MB in the end (delta: -69.5 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 88.18 ms. Allocated memory is still 203.4 MB. Free memory was 170.8 MB in the beginning and 166.4 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1195.12 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 166.4 MB in the beginning and 199.0 MB in the end (delta: -32.7 MB). Peak memory consumption was 84.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29655.96 ms. Allocated memory was 235.4 MB in the beginning and 591.4 MB in the end (delta: 356.0 MB). Free memory was 197.6 MB in the beginning and 406.1 MB in the end (delta: -208.5 MB). Peak memory consumption was 147.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 284]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L85] int waterLevel = 1; [L86] int methaneLevelCritical = 0; [L179] int cleanupTimeShifts = 4; [L292] int pumpRunning = 0; [L293] int systemActive = 1; [L679] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L876] int methAndRunningLastTime ; [L257] int retValue_acc ; [L258] int tmp ; [L262] FCALL select_helpers() [L263] FCALL select_features() [L264] CALL, EXPR valid_product() [L69] int retValue_acc ; [L72] retValue_acc = 1 [L73] return (retValue_acc); [L264] RET, EXPR valid_product() [L264] tmp = valid_product() [L266] COND TRUE \read(tmp) [L268] FCALL setup() [L269] CALL runTest() [L250] CALL __utac_acc__Specification2_spec__1() [L881] methAndRunningLastTime = 0 [L250] RET __utac_acc__Specification2_spec__1() [L251] CALL test() [L446] int splverifierCounter ; [L447] int tmp ; [L448] int tmp___0 ; [L449] int tmp___1 ; [L450] int tmp___2 ; [L453] splverifierCounter = 0 [L455] COND TRUE 1 [L457] COND TRUE splverifierCounter < 4 [L463] tmp = __VERIFIER_nondet_int() [L465] COND TRUE \read(tmp) [L467] CALL waterRise() [L103] COND TRUE waterLevel < 2 [L104] waterLevel = waterLevel + 1 [L467] RET waterRise() [L473] tmp___0 = __VERIFIER_nondet_int() [L475] COND TRUE \read(tmp___0) [L477] CALL changeMethaneLevel() [L115] COND FALSE !(\read(methaneLevelCritical)) [L118] methaneLevelCritical = 1 [L477] RET changeMethaneLevel() [L483] tmp___2 = __VERIFIER_nondet_int() [L485] COND TRUE \read(tmp___2) [L498] CALL timeShift() [L300] COND FALSE !(\read(pumpRunning)) [L307] COND TRUE \read(systemActive) [L309] CALL processEnvironment() [L329] int tmp ; [L332] COND TRUE ! pumpRunning [L334] CALL, EXPR isHighWaterLevel() [L426] int retValue_acc ; [L427] int tmp ; [L428] int tmp___0 ; [L432] CALL, EXPR isHighWaterSensorDry() [L165] int retValue_acc ; [L168] COND FALSE !(waterLevel < 2) [L172] retValue_acc = 0 [L173] return (retValue_acc); [L432] RET, EXPR isHighWaterSensorDry() [L432] tmp = isHighWaterSensorDry() [L434] COND FALSE !(\read(tmp)) [L437] tmp___0 = 1 [L439] retValue_acc = tmp___0 [L440] return (retValue_acc); [L334] RET, EXPR isHighWaterLevel() [L334] tmp = isHighWaterLevel() [L336] COND TRUE \read(tmp) [L338] CALL activatePump() [L357] pumpRunning = 1 [L338] RET activatePump() [L309] RET processEnvironment() [L315] CALL __utac_acc__Specification2_spec__2() [L886] int tmp ; [L887] int tmp___0 ; [L891] CALL, EXPR isMethaneLevelCritical() [L124] int retValue_acc ; [L127] retValue_acc = methaneLevelCritical [L128] return (retValue_acc); [L891] RET, EXPR isMethaneLevelCritical() [L891] tmp = isMethaneLevelCritical() [L893] COND TRUE \read(tmp) [L895] CALL, EXPR isPumpRunning() [L381] int retValue_acc ; [L384] retValue_acc = pumpRunning [L385] return (retValue_acc); [L895] RET, EXPR isPumpRunning() [L895] tmp___0 = isPumpRunning() [L897] COND TRUE \read(tmp___0) [L898] COND FALSE !(\read(methAndRunningLastTime)) [L903] methAndRunningLastTime = 1 [L315] RET __utac_acc__Specification2_spec__2() [L498] RET timeShift() [L455] COND TRUE 1 [L457] COND TRUE splverifierCounter < 4 [L463] tmp = __VERIFIER_nondet_int() [L465] COND FALSE !(\read(tmp)) [L473] tmp___0 = __VERIFIER_nondet_int() [L475] COND FALSE !(\read(tmp___0)) [L483] tmp___2 = __VERIFIER_nondet_int() [L485] COND TRUE \read(tmp___2) [L498] CALL timeShift() [L300] COND TRUE \read(pumpRunning) [L302] CALL lowerWaterLevel() [L91] COND TRUE waterLevel > 0 [L92] waterLevel = waterLevel - 1 [L302] RET lowerWaterLevel() [L307] COND TRUE \read(systemActive) [L309] CALL processEnvironment() [L329] int tmp ; [L332] COND FALSE !(! pumpRunning) [L347] FCALL processEnvironment__wrappee__base() [L309] RET processEnvironment() [L315] CALL __utac_acc__Specification2_spec__2() [L886] int tmp ; [L887] int tmp___0 ; [L891] CALL, EXPR isMethaneLevelCritical() [L124] int retValue_acc ; [L127] retValue_acc = methaneLevelCritical [L128] return (retValue_acc); [L891] RET, EXPR isMethaneLevelCritical() [L891] tmp = isMethaneLevelCritical() [L893] COND TRUE \read(tmp) [L895] CALL, EXPR isPumpRunning() [L381] int retValue_acc ; [L384] retValue_acc = pumpRunning [L385] return (retValue_acc); [L895] RET, EXPR isPumpRunning() [L895] tmp___0 = isPumpRunning() [L897] COND TRUE \read(tmp___0) [L898] COND TRUE \read(methAndRunningLastTime) [L900] CALL __automaton_fail() [L284] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 38 procedures, 220 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 29.5s, OverallIterations: 11, TraceHistogramMax: 2, AutomataDifference: 23.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 970 SDtfs, 2411 SDslu, 1123 SDs, 0 SdLazy, 4872 SolverSat, 1533 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 413 GetRequests, 259 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 10.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=919occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 10 MinimizatonAttempts, 841 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 848 NumberOfCodeBlocks, 848 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 709 ConstructedInterpolants, 0 QuantifiedInterpolants, 223096 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 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...