/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:10:51,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:10:51,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:10:51,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:10:51,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:10:51,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:10:51,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:10:51,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:10:51,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:10:51,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:10:51,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:10:51,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:10:51,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:10:51,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:10:51,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:10:51,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:10:51,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:10:51,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:10:51,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:10:51,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:10:51,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:10:51,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:10:51,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:10:51,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:10:51,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:10:51,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:10:51,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:10:51,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:10:51,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:10:51,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:10:51,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:10:51,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:10:51,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:10:51,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:10:51,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:10:51,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:10:51,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:10:51,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:10:51,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:10:51,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:10:51,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:10:51,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 01:10:51,955 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:10:51,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:10:51,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:10:51,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:10:51,956 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:10:51,956 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:10:51,957 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:10:51,957 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:10:51,957 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:10:51,957 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:10:51,957 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:10:51,957 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:10:51,957 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:10:51,957 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:10:51,957 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:10:51,958 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:10:51,958 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:10:51,958 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:10:51,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:10:51,958 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:10:51,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:10:51,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:10:51,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:10:51,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:10:51,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:10:51,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:10:51,959 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:10:51,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:10:51,959 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:10:51,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:10:51,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:10:51,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:10:51,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:10:51,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:10:51,960 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:10:51,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:10:51,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:10:51,964 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:10:51,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:10:51,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:10:51,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:10:51,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:10:52,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:10:52,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:10:52,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:10:52,228 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:10:52,229 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:10:52,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2023-04-03 01:10:53,430 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:10:53,680 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:10:53,681 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2023-04-03 01:10:53,697 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5be190b2c/8601411c9e284cfaa41fb92d2bd2fb6b/FLAG4fd3b8f17 [2023-04-03 01:10:53,709 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5be190b2c/8601411c9e284cfaa41fb92d2bd2fb6b [2023-04-03 01:10:53,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:10:53,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:10:53,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:10:53,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:10:53,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:10:53,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:10:53" (1/1) ... [2023-04-03 01:10:53,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b231bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:10:53, skipping insertion in model container [2023-04-03 01:10:53,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:10:53" (1/1) ... [2023-04-03 01:10:53,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:10:53,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:10:53,940 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2023-04-03 01:10:54,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:10:54,038 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:10:54,058 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2023-04-03 01:10:54,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:10:54,131 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:10:54,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:10:54 WrapperNode [2023-04-03 01:10:54,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:10:54,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:10:54,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:10:54,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:10:54,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:10:54" (1/1) ... [2023-04-03 01:10:54,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:10:54" (1/1) ... [2023-04-03 01:10:54,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:10:54" (1/1) ... [2023-04-03 01:10:54,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:10:54" (1/1) ... [2023-04-03 01:10:54,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:10:54" (1/1) ... [2023-04-03 01:10:54,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:10:54" (1/1) ... [2023-04-03 01:10:54,184 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:10:54" (1/1) ... [2023-04-03 01:10:54,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:10:54" (1/1) ... [2023-04-03 01:10:54,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:10:54,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:10:54,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:10:54,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:10:54,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:10:54" (1/1) ... [2023-04-03 01:10:54,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:10:54,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:10:54,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 01:10:54,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 01:10:54,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:10:54,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:10:54,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-03 01:10:54,264 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:10:54,264 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2023-04-03 01:10:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-04-03 01:10:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-04-03 01:10:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-04-03 01:10:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2023-04-03 01:10:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2023-04-03 01:10:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2023-04-03 01:10:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2023-04-03 01:10:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-03 01:10:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-03 01:10:54,265 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-03 01:10:54,266 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-03 01:10:54,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:10:54,266 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-03 01:10:54,266 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-03 01:10:54,266 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-03 01:10:54,266 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-03 01:10:54,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-03 01:10:54,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-03 01:10:54,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-03 01:10:54,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-03 01:10:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-03 01:10:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-03 01:10:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-03 01:10:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-03 01:10:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-03 01:10:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2023-04-03 01:10:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__highWaterSensor [2023-04-03 01:10:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2023-04-03 01:10:54,267 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__lowWaterSensor [2023-04-03 01:10:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2023-04-03 01:10:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__methaneAlarm [2023-04-03 01:10:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2023-04-03 01:10:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2023-04-03 01:10:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__role__methaneQuery [2023-04-03 01:10:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2023-04-03 01:10:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-04-03 01:10:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-04-03 01:10:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-04-03 01:10:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2023-04-03 01:10:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2023-04-03 01:10:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2023-04-03 01:10:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2023-04-03 01:10:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2023-04-03 01:10:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__1 [2023-04-03 01:10:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__2 [2023-04-03 01:10:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__3 [2023-04-03 01:10:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:10:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:10:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:10:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:10:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-03 01:10:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-03 01:10:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2023-04-03 01:10:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-04-03 01:10:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-04-03 01:10:54,271 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-04-03 01:10:54,271 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2023-04-03 01:10:54,271 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2023-04-03 01:10:54,271 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2023-04-03 01:10:54,271 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2023-04-03 01:10:54,271 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-03 01:10:54,271 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-03 01:10:54,271 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2023-04-03 01:10:54,271 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-03 01:10:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-03 01:10:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__1 [2023-04-03 01:10:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-03 01:10:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-03 01:10:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-03 01:10:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-03 01:10:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-03 01:10:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:10:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-03 01:10:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-03 01:10:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-03 01:10:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-03 01:10:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-03 01:10:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-03 01:10:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-03 01:10:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:10:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-03 01:10:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-03 01:10:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:10:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-03 01:10:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-03 01:10:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:10:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-03 01:10:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-03 01:10:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-03 01:10:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2023-04-03 01:10:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2023-04-03 01:10:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2023-04-03 01:10:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-04-03 01:10:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-04-03 01:10:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__2 [2023-04-03 01:10:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__3 [2023-04-03 01:10:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2023-04-03 01:10:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2023-04-03 01:10:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2023-04-03 01:10:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__highWaterSensor [2023-04-03 01:10:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2023-04-03 01:10:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2023-04-03 01:10:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__lowWaterSensor [2023-04-03 01:10:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2023-04-03 01:10:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-04-03 01:10:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__methaneAlarm [2023-04-03 01:10:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2023-04-03 01:10:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__role__methaneQuery [2023-04-03 01:10:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:10:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:10:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:10:54,419 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:10:54,421 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:10:55,043 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:10:55,193 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:10:55,194 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-03 01:10:55,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:10:55 BoogieIcfgContainer [2023-04-03 01:10:55,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:10:55,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:10:55,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:10:55,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:10:55,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:10:53" (1/3) ... [2023-04-03 01:10:55,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542054ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:10:55, skipping insertion in model container [2023-04-03 01:10:55,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:10:54" (2/3) ... [2023-04-03 01:10:55,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542054ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:10:55, skipping insertion in model container [2023-04-03 01:10:55,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:10:55" (3/3) ... [2023-04-03 01:10:55,221 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_productSimulator.cil.c [2023-04-03 01:10:55,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:10:55,239 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:10:55,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:10:55,305 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@309d0562, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:10:55,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:10:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 216 states, 100 states have (on average 1.29) internal successors, (129), 122 states have internal predecessors, (129), 72 states have call successors, (72), 41 states have call predecessors, (72), 41 states have return successors, (72), 61 states have call predecessors, (72), 72 states have call successors, (72) [2023-04-03 01:10:55,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 01:10:55,321 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:10:55,322 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2023-04-03 01:10:55,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:10:55,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:10:55,327 INFO L85 PathProgramCache]: Analyzing trace with hash -663207232, now seen corresponding path program 1 times [2023-04-03 01:10:55,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:10:55,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707916134] [2023-04-03 01:10:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:10:55,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:10:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:10:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-03 01:10:55,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:10:55,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707916134] [2023-04-03 01:10:55,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707916134] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:10:55,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:10:55,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-03 01:10:55,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330250281] [2023-04-03 01:10:55,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:10:55,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-03 01:10:55,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:10:55,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-03 01:10:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-03 01:10:55,716 INFO L87 Difference]: Start difference. First operand has 216 states, 100 states have (on average 1.29) internal successors, (129), 122 states have internal predecessors, (129), 72 states have call successors, (72), 41 states have call predecessors, (72), 41 states have return successors, (72), 61 states have call predecessors, (72), 72 states have call successors, (72) Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-04-03 01:10:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:10:55,826 INFO L93 Difference]: Finished difference Result 348 states and 438 transitions. [2023-04-03 01:10:55,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-03 01:10:55,829 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 76 [2023-04-03 01:10:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:10:55,842 INFO L225 Difference]: With dead ends: 348 [2023-04-03 01:10:55,843 INFO L226 Difference]: Without dead ends: 183 [2023-04-03 01:10:55,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-03 01:10:55,855 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:10:55,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 210 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:10:55,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-04-03 01:10:55,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2023-04-03 01:10:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 91 states have (on average 1.2637362637362637) internal successors, (115), 110 states have internal predecessors, (115), 57 states have call successors, (57), 39 states have call predecessors, (57), 34 states have return successors, (52), 41 states have call predecessors, (52), 52 states have call successors, (52) [2023-04-03 01:10:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 224 transitions. [2023-04-03 01:10:55,909 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 224 transitions. Word has length 76 [2023-04-03 01:10:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:10:55,910 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 224 transitions. [2023-04-03 01:10:55,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-04-03 01:10:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 224 transitions. [2023-04-03 01:10:55,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 01:10:55,914 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:10:55,914 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2023-04-03 01:10:55,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:10:55,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:10:55,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:10:55,916 INFO L85 PathProgramCache]: Analyzing trace with hash -535861565, now seen corresponding path program 1 times [2023-04-03 01:10:55,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:10:55,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382707864] [2023-04-03 01:10:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:10:55,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:10:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:10:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-03 01:10:56,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:10:56,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382707864] [2023-04-03 01:10:56,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382707864] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:10:56,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:10:56,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:10:56,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679022949] [2023-04-03 01:10:56,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:10:56,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:10:56,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:10:56,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:10:56,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:10:56,062 INFO L87 Difference]: Start difference. First operand 183 states and 224 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-04-03 01:10:56,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:10:56,148 INFO L93 Difference]: Finished difference Result 294 states and 359 transitions. [2023-04-03 01:10:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:10:56,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 77 [2023-04-03 01:10:56,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:10:56,152 INFO L225 Difference]: With dead ends: 294 [2023-04-03 01:10:56,152 INFO L226 Difference]: Without dead ends: 175 [2023-04-03 01:10:56,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:10:56,155 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 15 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:10:56,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 359 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:10:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-03 01:10:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-03 01:10:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 105 states have internal predecessors, (109), 54 states have call successors, (54), 38 states have call predecessors, (54), 34 states have return successors, (50), 39 states have call predecessors, (50), 50 states have call successors, (50) [2023-04-03 01:10:56,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 213 transitions. [2023-04-03 01:10:56,177 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 213 transitions. Word has length 77 [2023-04-03 01:10:56,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:10:56,177 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 213 transitions. [2023-04-03 01:10:56,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-04-03 01:10:56,177 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 213 transitions. [2023-04-03 01:10:56,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-03 01:10:56,185 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:10:56,185 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2023-04-03 01:10:56,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:10:56,185 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:10:56,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:10:56,186 INFO L85 PathProgramCache]: Analyzing trace with hash -433669045, now seen corresponding path program 1 times [2023-04-03 01:10:56,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:10:56,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544094293] [2023-04-03 01:10:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:10:56,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:10:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:10:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-03 01:10:56,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:10:56,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544094293] [2023-04-03 01:10:56,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544094293] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:10:56,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:10:56,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 01:10:56,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545586693] [2023-04-03 01:10:56,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:10:56,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 01:10:56,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:10:56,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 01:10:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:10:56,537 INFO L87 Difference]: Start difference. First operand 175 states and 213 transitions. Second operand has 9 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2023-04-03 01:10:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:10:57,292 INFO L93 Difference]: Finished difference Result 499 states and 622 transitions. [2023-04-03 01:10:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 01:10:57,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 81 [2023-04-03 01:10:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:10:57,302 INFO L225 Difference]: With dead ends: 499 [2023-04-03 01:10:57,302 INFO L226 Difference]: Without dead ends: 363 [2023-04-03 01:10:57,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-04-03 01:10:57,312 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 497 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:10:57,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 794 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:10:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-04-03 01:10:57,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 351. [2023-04-03 01:10:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 180 states have (on average 1.3111111111111111) internal successors, (236), 217 states have internal predecessors, (236), 102 states have call successors, (102), 74 states have call predecessors, (102), 68 states have return successors, (99), 74 states have call predecessors, (99), 98 states have call successors, (99) [2023-04-03 01:10:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 437 transitions. [2023-04-03 01:10:57,374 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 437 transitions. Word has length 81 [2023-04-03 01:10:57,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:10:57,374 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 437 transitions. [2023-04-03 01:10:57,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2023-04-03 01:10:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 437 transitions. [2023-04-03 01:10:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 01:10:57,376 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:10:57,376 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:10:57,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:10:57,379 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:10:57,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:10:57,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1594176361, now seen corresponding path program 1 times [2023-04-03 01:10:57,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:10:57,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364831736] [2023-04-03 01:10:57,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:10:57,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:10:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:10:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-03 01:10:57,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:10:57,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364831736] [2023-04-03 01:10:57,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364831736] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:10:57,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:10:57,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 01:10:57,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668818060] [2023-04-03 01:10:57,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:10:57,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 01:10:57,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:10:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 01:10:57,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:10:57,583 INFO L87 Difference]: Start difference. First operand 351 states and 437 transitions. Second operand has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-04-03 01:10:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:10:58,190 INFO L93 Difference]: Finished difference Result 928 states and 1262 transitions. [2023-04-03 01:10:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 01:10:58,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 86 [2023-04-03 01:10:58,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:10:58,197 INFO L225 Difference]: With dead ends: 928 [2023-04-03 01:10:58,197 INFO L226 Difference]: Without dead ends: 616 [2023-04-03 01:10:58,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:10:58,208 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 247 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:10:58,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 508 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:10:58,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2023-04-03 01:10:58,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 559. [2023-04-03 01:10:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 293 states have (on average 1.2457337883959045) internal successors, (365), 331 states have internal predecessors, (365), 137 states have call successors, (137), 105 states have call predecessors, (137), 128 states have return successors, (207), 136 states have call predecessors, (207), 133 states have call successors, (207) [2023-04-03 01:10:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 709 transitions. [2023-04-03 01:10:58,274 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 709 transitions. Word has length 86 [2023-04-03 01:10:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:10:58,274 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 709 transitions. [2023-04-03 01:10:58,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-04-03 01:10:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 709 transitions. [2023-04-03 01:10:58,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-03 01:10:58,300 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:10:58,300 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:10:58,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:10:58,301 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:10:58,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:10:58,301 INFO L85 PathProgramCache]: Analyzing trace with hash 354638509, now seen corresponding path program 1 times [2023-04-03 01:10:58,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:10:58,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211137694] [2023-04-03 01:10:58,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:10:58,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:10:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:10:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-03 01:10:58,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:10:58,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211137694] [2023-04-03 01:10:58,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211137694] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:10:58,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:10:58,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-04-03 01:10:58,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781919821] [2023-04-03 01:10:58,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:10:58,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-03 01:10:58,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:10:58,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-03 01:10:58,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-04-03 01:10:58,795 INFO L87 Difference]: Start difference. First operand 559 states and 709 transitions. Second operand has 14 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (30), 3 states have call predecessors, (30), 7 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2023-04-03 01:10:59,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:10:59,803 INFO L93 Difference]: Finished difference Result 1586 states and 2094 transitions. [2023-04-03 01:10:59,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 01:10:59,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (30), 3 states have call predecessors, (30), 7 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) Word has length 114 [2023-04-03 01:10:59,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:10:59,811 INFO L225 Difference]: With dead ends: 1586 [2023-04-03 01:10:59,811 INFO L226 Difference]: Without dead ends: 1066 [2023-04-03 01:10:59,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2023-04-03 01:10:59,813 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 504 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 01:10:59,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1490 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 01:10:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2023-04-03 01:10:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1048. [2023-04-03 01:10:59,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 574 states have (on average 1.2630662020905923) internal successors, (725), 641 states have internal predecessors, (725), 251 states have call successors, (251), 201 states have call predecessors, (251), 222 states have return successors, (388), 237 states have call predecessors, (388), 247 states have call successors, (388) [2023-04-03 01:10:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1364 transitions. [2023-04-03 01:10:59,911 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1364 transitions. Word has length 114 [2023-04-03 01:10:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:10:59,912 INFO L495 AbstractCegarLoop]: Abstraction has 1048 states and 1364 transitions. [2023-04-03 01:10:59,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (30), 3 states have call predecessors, (30), 7 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2023-04-03 01:10:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1364 transitions. [2023-04-03 01:10:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-03 01:10:59,914 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:10:59,914 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:10:59,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 01:10:59,915 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:10:59,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:10:59,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1598902891, now seen corresponding path program 1 times [2023-04-03 01:10:59,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:10:59,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67048368] [2023-04-03 01:10:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:10:59,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:10:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:11:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-03 01:11:00,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:11:00,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67048368] [2023-04-03 01:11:00,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67048368] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:11:00,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:11:00,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 01:11:00,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261088746] [2023-04-03 01:11:00,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:11:00,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 01:11:00,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:11:00,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 01:11:00,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:11:00,336 INFO L87 Difference]: Start difference. First operand 1048 states and 1364 transitions. Second operand has 9 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2023-04-03 01:11:01,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:11:01,530 INFO L93 Difference]: Finished difference Result 3360 states and 4486 transitions. [2023-04-03 01:11:01,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 01:11:01,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2023-04-03 01:11:01,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:11:01,546 INFO L225 Difference]: With dead ends: 3360 [2023-04-03 01:11:01,546 INFO L226 Difference]: Without dead ends: 2550 [2023-04-03 01:11:01,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-04-03 01:11:01,551 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 458 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 01:11:01,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 389 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 01:11:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2023-04-03 01:11:01,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2202. [2023-04-03 01:11:01,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 1207 states have (on average 1.2651201325600663) internal successors, (1527), 1343 states have internal predecessors, (1527), 513 states have call successors, (513), 411 states have call predecessors, (513), 481 states have return successors, (837), 508 states have call predecessors, (837), 509 states have call successors, (837) [2023-04-03 01:11:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2877 transitions. [2023-04-03 01:11:01,840 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2877 transitions. Word has length 117 [2023-04-03 01:11:01,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:11:01,840 INFO L495 AbstractCegarLoop]: Abstraction has 2202 states and 2877 transitions. [2023-04-03 01:11:01,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2023-04-03 01:11:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2877 transitions. [2023-04-03 01:11:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-03 01:11:01,847 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:11:01,848 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:11:01,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 01:11:01,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:11:01,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:11:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash -21287626, now seen corresponding path program 1 times [2023-04-03 01:11:01,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:11:01,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199983674] [2023-04-03 01:11:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:11:01,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:11:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:11:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-04-03 01:11:01,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:11:01,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199983674] [2023-04-03 01:11:01,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199983674] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:11:01,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903601291] [2023-04-03 01:11:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:11:01,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:11:01,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:11:01,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:11:01,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:11:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:11:02,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:11:02,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:11:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-03 01:11:02,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:11:02,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903601291] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:11:02,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:11:02,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-04-03 01:11:02,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896082652] [2023-04-03 01:11:02,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:11:02,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:11:02,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:11:02,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:11:02,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:11:02,292 INFO L87 Difference]: Start difference. First operand 2202 states and 2877 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:11:02,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:11:02,618 INFO L93 Difference]: Finished difference Result 4687 states and 6313 transitions. [2023-04-03 01:11:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:11:02,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 163 [2023-04-03 01:11:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:11:02,633 INFO L225 Difference]: With dead ends: 4687 [2023-04-03 01:11:02,633 INFO L226 Difference]: Without dead ends: 2524 [2023-04-03 01:11:02,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:11:02,643 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 106 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:11:02,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 377 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:11:02,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2023-04-03 01:11:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 2524. [2023-04-03 01:11:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 1400 states have (on average 1.255) internal successors, (1757), 1541 states have internal predecessors, (1757), 575 states have call successors, (575), 478 states have call predecessors, (575), 548 states have return successors, (952), 578 states have call predecessors, (952), 571 states have call successors, (952) [2023-04-03 01:11:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 3284 transitions. [2023-04-03 01:11:02,934 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 3284 transitions. Word has length 163 [2023-04-03 01:11:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:11:02,934 INFO L495 AbstractCegarLoop]: Abstraction has 2524 states and 3284 transitions. [2023-04-03 01:11:02,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2023-04-03 01:11:02,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 3284 transitions. [2023-04-03 01:11:02,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-03 01:11:02,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:11:02,940 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:11:02,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 01:11:03,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:11:03,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:11:03,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:11:03,157 INFO L85 PathProgramCache]: Analyzing trace with hash -532601210, now seen corresponding path program 1 times [2023-04-03 01:11:03,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:11:03,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945819634] [2023-04-03 01:11:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:11:03,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:11:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:11:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-03 01:11:03,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:11:03,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945819634] [2023-04-03 01:11:03,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945819634] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:11:03,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431270965] [2023-04-03 01:11:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:11:03,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:11:03,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:11:03,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:11:03,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 01:11:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:11:03,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-03 01:11:03,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:11:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-03 01:11:03,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:11:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-03 01:11:04,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431270965] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 01:11:04,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [865881666] [2023-04-03 01:11:04,321 INFO L159 IcfgInterpreter]: Started Sifa with 116 locations of interest [2023-04-03 01:11:04,321 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 01:11:04,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 01:11:04,331 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 01:11:04,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 01:11:04,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 55 for LOIs [2023-04-03 01:11:04,745 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 68 for LOIs [2023-04-03 01:11:05,503 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 66 for LOIs [2023-04-03 01:11:05,607 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 66 for LOIs [2023-04-03 01:11:26,593 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 180 for LOIs [2023-04-03 01:11:26,682 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 179 for LOIs [2023-04-03 01:11:30,139 INFO L197 IcfgInterpreter]: Interpreting procedure lowerWaterLevel with input of size 144 for LOIs [2023-04-03 01:11:30,160 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment with input of size 223 for LOIs [2023-04-03 01:11:30,975 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 181 for LOIs [2023-04-03 01:11:31,590 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 145 for LOIs [2023-04-03 01:11:32,237 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__role__highWaterSensor with input of size 147 for LOIs [2023-04-03 01:11:34,545 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 140 for LOIs [2023-04-03 01:11:34,559 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterLevel with input of size 85 for LOIs [2023-04-03 01:11:35,019 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterSensorDry with input of size 85 for LOIs [2023-04-03 01:11:35,035 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump with input of size 93 for LOIs [2023-04-03 01:11:35,092 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 75 for LOIs [2023-04-03 01:11:35,099 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 56 for LOIs [2023-04-03 01:11:35,102 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 56 for LOIs [2023-04-03 01:11:35,808 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 146 for LOIs [2023-04-03 01:11:35,858 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification5_spec__3 with input of size 105 for LOIs [2023-04-03 01:11:36,562 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 113 for LOIs [2023-04-03 01:11:36,573 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 105 for LOIs [2023-04-03 01:11:36,586 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification5_spec__2 with input of size 173 for LOIs [2023-04-03 01:11:36,878 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 171 for LOIs [2023-04-03 01:11:36,898 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification5_spec__1 with input of size 58 for LOIs [2023-04-03 01:11:36,902 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 56 for LOIs [2023-04-03 01:11:36,906 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 44 for LOIs [2023-04-03 01:11:36,910 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 01:12:11,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28432#(and (= 0 ~__SELECTED_FEATURE_startCommand~0) (<= 1 |#StackHeapBarrier|) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (not (= ~pumpRunning~0 0)) (<= ~pumpRunning~0 2147483647) (= ~methaneLevelCritical~0 0) (= ~head~0.offset 0) (= 1 ~systemActive~0) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= ~__SELECTED_FEATURE_methaneAlarm~0 0) (<= 0 (+ ~waterLevel~0 2147483648)) (= ~__GUIDSL_ROOT_PRODUCTION~0 1) (<= ~waterLevel~0 2147483647) (= ~head~0.base 0) (<= 0 (+ ~pumpRunning~0 2147483648)) (= |#NULL.offset| 0) (= ~__SELECTED_FEATURE_lowWaterSensor~0 0) (= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2023-04-03 01:12:11,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 01:12:11,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 01:12:11,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 20 [2023-04-03 01:12:11,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572052646] [2023-04-03 01:12:11,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 01:12:11,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 01:12:11,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:12:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 01:12:11,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=9737, Unknown=0, NotChecked=0, Total=10506 [2023-04-03 01:12:11,133 INFO L87 Difference]: Start difference. First operand 2524 states and 3284 transitions. Second operand has 20 states, 13 states have (on average 10.307692307692308) internal successors, (134), 16 states have internal predecessors, (134), 8 states have call successors, (65), 6 states have call predecessors, (65), 12 states have return successors, (70), 11 states have call predecessors, (70), 7 states have call successors, (70) [2023-04-03 01:12:13,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:12:13,346 INFO L93 Difference]: Finished difference Result 4967 states and 6600 transitions. [2023-04-03 01:12:13,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-03 01:12:13,346 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 13 states have (on average 10.307692307692308) internal successors, (134), 16 states have internal predecessors, (134), 8 states have call successors, (65), 6 states have call predecessors, (65), 12 states have return successors, (70), 11 states have call predecessors, (70), 7 states have call successors, (70) Word has length 168 [2023-04-03 01:12:13,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:12:13,361 INFO L225 Difference]: With dead ends: 4967 [2023-04-03 01:12:13,361 INFO L226 Difference]: Without dead ends: 3017 [2023-04-03 01:12:13,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 416 SyntacticMatches, 8 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8059 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=1296, Invalid=16526, Unknown=0, NotChecked=0, Total=17822 [2023-04-03 01:12:13,372 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 757 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 2025 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:12:13,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 2025 Invalid, 2355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 1733 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 01:12:13,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2023-04-03 01:12:13,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2780. [2023-04-03 01:12:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 1550 states have (on average 1.2464516129032257) internal successors, (1932), 1722 states have internal predecessors, (1932), 638 states have call successors, (638), 549 states have call predecessors, (638), 591 states have return successors, (917), 599 states have call predecessors, (917), 634 states have call successors, (917) [2023-04-03 01:12:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 3487 transitions. [2023-04-03 01:12:13,611 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 3487 transitions. Word has length 168 [2023-04-03 01:12:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:12:13,613 INFO L495 AbstractCegarLoop]: Abstraction has 2780 states and 3487 transitions. [2023-04-03 01:12:13,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 13 states have (on average 10.307692307692308) internal successors, (134), 16 states have internal predecessors, (134), 8 states have call successors, (65), 6 states have call predecessors, (65), 12 states have return successors, (70), 11 states have call predecessors, (70), 7 states have call successors, (70) [2023-04-03 01:12:13,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 3487 transitions. [2023-04-03 01:12:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-03 01:12:13,621 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:12:13,622 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:12:13,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 01:12:13,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-03 01:12:13,829 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:12:13,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:12:13,830 INFO L85 PathProgramCache]: Analyzing trace with hash 765295377, now seen corresponding path program 1 times [2023-04-03 01:12:13,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:12:13,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180741423] [2023-04-03 01:12:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:12:13,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:12:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:12:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-04-03 01:12:13,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:12:13,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180741423] [2023-04-03 01:12:13,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180741423] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:12:13,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247761126] [2023-04-03 01:12:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:12:13,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:12:13,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:12:13,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:12:13,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 01:12:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:12:14,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:12:14,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:12:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-04-03 01:12:14,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:12:14,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247761126] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:12:14,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:12:14,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-04-03 01:12:14,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283596710] [2023-04-03 01:12:14,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:12:14,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:12:14,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:12:14,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:12:14,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:12:14,218 INFO L87 Difference]: Start difference. First operand 2780 states and 3487 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (53), 3 states have call predecessors, (53), 3 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2023-04-03 01:12:14,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:12:14,556 INFO L93 Difference]: Finished difference Result 8004 states and 10318 transitions. [2023-04-03 01:12:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:12:14,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (53), 3 states have call predecessors, (53), 3 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) Word has length 230 [2023-04-03 01:12:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:12:14,587 INFO L225 Difference]: With dead ends: 8004 [2023-04-03 01:12:14,587 INFO L226 Difference]: Without dead ends: 5293 [2023-04-03 01:12:14,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:12:14,598 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 107 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:12:14,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 407 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:12:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2023-04-03 01:12:15,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 5290. [2023-04-03 01:12:15,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5290 states, 2977 states have (on average 1.2465569365132685) internal successors, (3711), 3273 states have internal predecessors, (3711), 1179 states have call successors, (1179), 1051 states have call predecessors, (1179), 1133 states have return successors, (1838), 1145 states have call predecessors, (1838), 1175 states have call successors, (1838) [2023-04-03 01:12:15,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5290 states to 5290 states and 6728 transitions. [2023-04-03 01:12:15,064 INFO L78 Accepts]: Start accepts. Automaton has 5290 states and 6728 transitions. Word has length 230 [2023-04-03 01:12:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:12:15,065 INFO L495 AbstractCegarLoop]: Abstraction has 5290 states and 6728 transitions. [2023-04-03 01:12:15,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (53), 3 states have call predecessors, (53), 3 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2023-04-03 01:12:15,065 INFO L276 IsEmpty]: Start isEmpty. Operand 5290 states and 6728 transitions. [2023-04-03 01:12:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-04-03 01:12:15,078 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:12:15,078 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:12:15,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 01:12:15,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:12:15,285 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:12:15,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:12:15,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1838566777, now seen corresponding path program 1 times [2023-04-03 01:12:15,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:12:15,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416997419] [2023-04-03 01:12:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:12:15,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:12:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:12:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-04-03 01:12:15,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:12:15,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416997419] [2023-04-03 01:12:15,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416997419] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:12:15,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842618957] [2023-04-03 01:12:15,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:12:15,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:12:15,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:12:15,385 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:12:15,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 01:12:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:12:15,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:12:15,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:12:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-04-03 01:12:15,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:12:15,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842618957] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:12:15,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:12:15,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-04-03 01:12:15,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951332824] [2023-04-03 01:12:15,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:12:15,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:12:15,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:12:15,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:12:15,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:12:15,725 INFO L87 Difference]: Start difference. First operand 5290 states and 6728 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2023-04-03 01:12:16,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:12:16,095 INFO L93 Difference]: Finished difference Result 7949 states and 10054 transitions. [2023-04-03 01:12:16,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:12:16,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) Word has length 235 [2023-04-03 01:12:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:12:16,124 INFO L225 Difference]: With dead ends: 7949 [2023-04-03 01:12:16,124 INFO L226 Difference]: Without dead ends: 5418 [2023-04-03 01:12:16,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:12:16,137 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 83 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:12:16,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 493 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:12:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2023-04-03 01:12:16,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 5407. [2023-04-03 01:12:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5407 states, 3047 states have (on average 1.2422054479816214) internal successors, (3785), 3349 states have internal predecessors, (3785), 1205 states have call successors, (1205), 1076 states have call predecessors, (1205), 1154 states have return successors, (1727), 1168 states have call predecessors, (1727), 1201 states have call successors, (1727) [2023-04-03 01:12:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 6717 transitions. [2023-04-03 01:12:16,642 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 6717 transitions. Word has length 235 [2023-04-03 01:12:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:12:16,643 INFO L495 AbstractCegarLoop]: Abstraction has 5407 states and 6717 transitions. [2023-04-03 01:12:16,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2023-04-03 01:12:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 6717 transitions. [2023-04-03 01:12:16,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-04-03 01:12:16,656 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:12:16,656 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:12:16,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-03 01:12:16,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:12:16,863 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:12:16,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:12:16,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1262945658, now seen corresponding path program 1 times [2023-04-03 01:12:16,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:12:16,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4806422] [2023-04-03 01:12:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:12:16,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:12:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:12:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 45 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-03 01:12:16,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:12:16,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4806422] [2023-04-03 01:12:16,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4806422] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:12:16,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493924620] [2023-04-03 01:12:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:12:16,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:12:16,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:12:16,940 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:12:16,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 01:12:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:12:17,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:12:17,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:12:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-03 01:12:17,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:12:17,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493924620] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:12:17,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:12:17,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-04-03 01:12:17,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867277160] [2023-04-03 01:12:17,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:12:17,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:12:17,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:12:17,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:12:17,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:12:17,218 INFO L87 Difference]: Start difference. First operand 5407 states and 6717 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2023-04-03 01:12:17,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:12:17,878 INFO L93 Difference]: Finished difference Result 15275 states and 19692 transitions. [2023-04-03 01:12:17,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:12:17,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) Word has length 234 [2023-04-03 01:12:17,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:12:17,937 INFO L225 Difference]: With dead ends: 15275 [2023-04-03 01:12:17,938 INFO L226 Difference]: Without dead ends: 10056 [2023-04-03 01:12:17,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:12:17,959 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 97 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:12:17,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 423 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:12:17,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10056 states. [2023-04-03 01:12:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10056 to 10043. [2023-04-03 01:12:18,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10043 states, 5706 states have (on average 1.2400981423063442) internal successors, (7076), 6200 states have internal predecessors, (7076), 2177 states have call successors, (2177), 2017 states have call predecessors, (2177), 2159 states have return successors, (3485), 2182 states have call predecessors, (3485), 2173 states have call successors, (3485) [2023-04-03 01:12:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10043 states to 10043 states and 12738 transitions. [2023-04-03 01:12:18,836 INFO L78 Accepts]: Start accepts. Automaton has 10043 states and 12738 transitions. Word has length 234 [2023-04-03 01:12:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:12:18,836 INFO L495 AbstractCegarLoop]: Abstraction has 10043 states and 12738 transitions. [2023-04-03 01:12:18,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2023-04-03 01:12:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 10043 states and 12738 transitions. [2023-04-03 01:12:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-04-03 01:12:18,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:12:18,857 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-03 01:12:18,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-03 01:12:19,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-03 01:12:19,064 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:12:19,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:12:19,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1615052608, now seen corresponding path program 1 times [2023-04-03 01:12:19,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:12:19,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945507400] [2023-04-03 01:12:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:12:19,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:12:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:12:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-04-03 01:12:19,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:12:19,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945507400] [2023-04-03 01:12:19,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945507400] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:12:19,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:12:19,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:12:19,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194951368] [2023-04-03 01:12:19,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:12:19,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:12:19,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:12:19,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:12:19,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:12:19,133 INFO L87 Difference]: Start difference. First operand 10043 states and 12738 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-04-03 01:12:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:12:19,651 INFO L93 Difference]: Finished difference Result 15996 states and 20300 transitions. [2023-04-03 01:12:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:12:19,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 237 [2023-04-03 01:12:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:12:19,688 INFO L225 Difference]: With dead ends: 15996 [2023-04-03 01:12:19,688 INFO L226 Difference]: Without dead ends: 6139 [2023-04-03 01:12:19,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:12:19,716 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 47 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:12:19,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 407 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:12:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6139 states. [2023-04-03 01:12:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6139 to 5972. [2023-04-03 01:12:20,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5972 states, 3375 states have (on average 1.2334814814814814) internal successors, (4163), 3710 states have internal predecessors, (4163), 1318 states have call successors, (1318), 1224 states have call predecessors, (1318), 1278 states have return successors, (1857), 1293 states have call predecessors, (1857), 1314 states have call successors, (1857) [2023-04-03 01:12:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5972 states to 5972 states and 7338 transitions. [2023-04-03 01:12:20,274 INFO L78 Accepts]: Start accepts. Automaton has 5972 states and 7338 transitions. Word has length 237 [2023-04-03 01:12:20,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:12:20,275 INFO L495 AbstractCegarLoop]: Abstraction has 5972 states and 7338 transitions. [2023-04-03 01:12:20,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-04-03 01:12:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 5972 states and 7338 transitions. [2023-04-03 01:12:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-04-03 01:12:20,288 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:12:20,289 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:12:20,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 01:12:20,290 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:12:20,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:12:20,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2008632402, now seen corresponding path program 1 times [2023-04-03 01:12:20,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:12:20,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221846160] [2023-04-03 01:12:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:12:20,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:12:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:12:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 40 proven. 12 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-04-03 01:12:20,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:12:20,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221846160] [2023-04-03 01:12:20,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221846160] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:12:20,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031533242] [2023-04-03 01:12:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:12:20,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:12:20,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:12:20,363 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:12:20,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-03 01:12:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:12:20,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:12:20,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:12:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-04-03 01:12:20,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:12:20,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031533242] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:12:20,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:12:20,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-04-03 01:12:20,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086509323] [2023-04-03 01:12:20,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:12:20,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:12:20,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:12:20,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:12:20,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:12:20,682 INFO L87 Difference]: Start difference. First operand 5972 states and 7338 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) [2023-04-03 01:12:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:12:21,062 INFO L93 Difference]: Finished difference Result 8757 states and 10679 transitions. [2023-04-03 01:12:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:12:21,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) Word has length 239 [2023-04-03 01:12:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:12:21,080 INFO L225 Difference]: With dead ends: 8757 [2023-04-03 01:12:21,081 INFO L226 Difference]: Without dead ends: 5989 [2023-04-03 01:12:21,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:12:21,089 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 83 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:12:21,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 490 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:12:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5989 states. [2023-04-03 01:12:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5989 to 5740. [2023-04-03 01:12:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5740 states, 3245 states have (on average 1.2286594761171032) internal successors, (3987), 3568 states have internal predecessors, (3987), 1266 states have call successors, (1266), 1176 states have call predecessors, (1266), 1228 states have return successors, (1633), 1241 states have call predecessors, (1633), 1262 states have call successors, (1633) [2023-04-03 01:12:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5740 states to 5740 states and 6886 transitions. [2023-04-03 01:12:21,598 INFO L78 Accepts]: Start accepts. Automaton has 5740 states and 6886 transitions. Word has length 239 [2023-04-03 01:12:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:12:21,598 INFO L495 AbstractCegarLoop]: Abstraction has 5740 states and 6886 transitions. [2023-04-03 01:12:21,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) [2023-04-03 01:12:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 5740 states and 6886 transitions. [2023-04-03 01:12:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-04-03 01:12:21,610 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:12:21,611 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:12:21,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-03 01:12:21,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:12:21,818 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:12:21,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:12:21,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1836478873, now seen corresponding path program 1 times [2023-04-03 01:12:21,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:12:21,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201548679] [2023-04-03 01:12:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:12:21,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:12:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:12:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-04-03 01:12:22,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:12:22,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201548679] [2023-04-03 01:12:22,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201548679] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:12:22,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130466522] [2023-04-03 01:12:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:12:22,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:12:22,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:12:22,024 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:12:22,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-03 01:12:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:12:22,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-03 01:12:22,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:12:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-03 01:12:22,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:12:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-04-03 01:12:22,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130466522] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 01:12:22,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1548127501] [2023-04-03 01:12:22,825 INFO L159 IcfgInterpreter]: Started Sifa with 130 locations of interest [2023-04-03 01:12:22,825 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 01:12:22,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 01:12:22,826 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 01:12:22,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 01:12:22,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 55 for LOIs [2023-04-03 01:12:23,026 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 68 for LOIs [2023-04-03 01:12:23,522 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 66 for LOIs [2023-04-03 01:12:23,572 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 66 for LOIs [2023-04-03 01:12:47,986 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 308 for LOIs [2023-04-03 01:12:48,164 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 221 for LOIs [2023-04-03 01:12:51,065 INFO L197 IcfgInterpreter]: Interpreting procedure lowerWaterLevel with input of size 177 for LOIs [2023-04-03 01:12:51,096 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment with input of size 181 for LOIs [2023-04-03 01:12:52,070 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__role__methaneAlarm with input of size 183 for LOIs [2023-04-03 01:12:53,623 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 141 for LOIs [2023-04-03 01:12:54,082 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 111 for LOIs [2023-04-03 01:12:54,551 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__role__highWaterSensor with input of size 113 for LOIs [2023-04-03 01:12:55,626 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterLevel with input of size 111 for LOIs [2023-04-03 01:12:56,126 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterSensorDry with input of size 111 for LOIs [2023-04-03 01:12:56,144 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump with input of size 117 for LOIs [2023-04-03 01:12:56,221 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 93 for LOIs [2023-04-03 01:12:56,229 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 174 for LOIs [2023-04-03 01:12:56,836 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 174 for LOIs [2023-04-03 01:12:56,863 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 56 for LOIs [2023-04-03 01:12:56,866 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 56 for LOIs [2023-04-03 01:12:57,497 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 146 for LOIs [2023-04-03 01:12:57,533 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification5_spec__3 with input of size 219 for LOIs [2023-04-03 01:12:59,047 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 225 for LOIs [2023-04-03 01:12:59,079 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 219 for LOIs [2023-04-03 01:12:59,115 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification5_spec__2 with input of size 216 for LOIs [2023-04-03 01:12:59,509 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 214 for LOIs [2023-04-03 01:12:59,540 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification5_spec__1 with input of size 58 for LOIs [2023-04-03 01:12:59,544 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 56 for LOIs [2023-04-03 01:12:59,548 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 44 for LOIs [2023-04-03 01:12:59,551 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 01:13:54,497 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '167669#(and (= 0 ~__SELECTED_FEATURE_startCommand~0) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (not (= ~pumpRunning~0 0)) (<= ~pumpRunning~0 1) (= ~methaneLevelCritical~0 0) (= ~head~0.offset 0) (<= ~pumpRunning~0 (+ 2147483649 ~__SELECTED_FEATURE_methaneQuery~0)) (<= (+ ~pumpRunning~0 ~__SELECTED_FEATURE_lowWaterSensor~0) 2147483648) (= 1 ~systemActive~0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (<= ~pumpRunning~0 (+ 2147483649 ~__SELECTED_FEATURE_lowWaterSensor~0)) (= ~__GUIDSL_ROOT_PRODUCTION~0 1) (<= (+ ~pumpRunning~0 ~__SELECTED_FEATURE_methaneQuery~0) 2147483648) (<= ~waterLevel~0 2147483647) (<= 0 ~pumpRunning~0) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= ~pumpRunning~0 (+ 2147483649 ~waterLevel~0)) (<= (+ ~__SELECTED_FEATURE_methaneAlarm~0 ~pumpRunning~0) 2147483648) (= ~__SELECTED_FEATURE_base~0 1) (<= ~pumpRunning~0 |#StackHeapBarrier|) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (<= ~pumpRunning~0 (+ ~__SELECTED_FEATURE_methaneAlarm~0 2147483649)) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2023-04-03 01:13:54,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 01:13:54,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 01:13:54,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2023-04-03 01:13:54,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440166240] [2023-04-03 01:13:54,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 01:13:54,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 01:13:54,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:13:54,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 01:13:54,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=9548, Unknown=0, NotChecked=0, Total=10100 [2023-04-03 01:13:54,502 INFO L87 Difference]: Start difference. First operand 5740 states and 6886 transitions. Second operand has 13 states, 9 states have (on average 12.88888888888889) internal successors, (116), 10 states have internal predecessors, (116), 3 states have call successors, (54), 3 states have call predecessors, (54), 7 states have return successors, (53), 6 states have call predecessors, (53), 3 states have call successors, (53) [2023-04-03 01:13:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:13:55,365 INFO L93 Difference]: Finished difference Result 16063 states and 19725 transitions. [2023-04-03 01:13:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 01:13:55,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 12.88888888888889) internal successors, (116), 10 states have internal predecessors, (116), 3 states have call successors, (54), 3 states have call predecessors, (54), 7 states have return successors, (53), 6 states have call predecessors, (53), 3 states have call successors, (53) Word has length 240 [2023-04-03 01:13:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:13:55,402 INFO L225 Difference]: With dead ends: 16063 [2023-04-03 01:13:55,402 INFO L226 Difference]: Without dead ends: 10401 [2023-04-03 01:13:55,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 608 SyntacticMatches, 23 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6597 ImplicationChecksByTransitivity, 55.0s TimeCoverageRelationStatistics Valid=575, Invalid=10137, Unknown=0, NotChecked=0, Total=10712 [2023-04-03 01:13:55,422 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 79 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 2274 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:13:55,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 2274 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:13:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10401 states. [2023-04-03 01:13:56,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10401 to 8903. [2023-04-03 01:13:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8903 states, 5069 states have (on average 1.2215427105938055) internal successors, (6192), 5563 states have internal predecessors, (6192), 1898 states have call successors, (1898), 1800 states have call predecessors, (1898), 1935 states have return successors, (2684), 1914 states have call predecessors, (2684), 1894 states have call successors, (2684) [2023-04-03 01:13:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8903 states to 8903 states and 10774 transitions. [2023-04-03 01:13:56,056 INFO L78 Accepts]: Start accepts. Automaton has 8903 states and 10774 transitions. Word has length 240 [2023-04-03 01:13:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:13:56,057 INFO L495 AbstractCegarLoop]: Abstraction has 8903 states and 10774 transitions. [2023-04-03 01:13:56,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 12.88888888888889) internal successors, (116), 10 states have internal predecessors, (116), 3 states have call successors, (54), 3 states have call predecessors, (54), 7 states have return successors, (53), 6 states have call predecessors, (53), 3 states have call successors, (53) [2023-04-03 01:13:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 8903 states and 10774 transitions. [2023-04-03 01:13:56,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-04-03 01:13:56,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:13:56,073 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-03 01:13:56,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-03 01:13:56,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:13:56,280 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:13:56,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:13:56,281 INFO L85 PathProgramCache]: Analyzing trace with hash 447484878, now seen corresponding path program 1 times [2023-04-03 01:13:56,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:13:56,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790215444] [2023-04-03 01:13:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:13:56,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:13:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:13:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 21 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-04-03 01:13:56,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:13:56,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790215444] [2023-04-03 01:13:56,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790215444] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:13:56,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076336508] [2023-04-03 01:13:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:13:56,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:13:56,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:13:56,939 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:13:56,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-03 01:13:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:13:57,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-03 01:13:57,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:13:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 20 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-03 01:13:57,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:13:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 73 proven. 8 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-04-03 01:13:59,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076336508] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 01:13:59,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516958725] [2023-04-03 01:13:59,856 INFO L159 IcfgInterpreter]: Started Sifa with 130 locations of interest [2023-04-03 01:13:59,856 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 01:13:59,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 01:13:59,857 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 01:13:59,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 01:14:00,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 55 for LOIs [2023-04-03 01:14:00,082 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 68 for LOIs [2023-04-03 01:14:00,541 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 66 for LOIs [2023-04-03 01:14:00,606 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 66 for LOIs [2023-04-03 01:14:25,535 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 361 for LOIs [2023-04-03 01:14:25,775 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 221 for LOIs [2023-04-03 01:14:29,311 INFO L197 IcfgInterpreter]: Interpreting procedure lowerWaterLevel with input of size 177 for LOIs [2023-04-03 01:14:29,342 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment with input of size 181 for LOIs [2023-04-03 01:14:30,279 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__role__methaneAlarm with input of size 183 for LOIs [2023-04-03 01:14:31,818 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 141 for LOIs [2023-04-03 01:14:32,281 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 111 for LOIs [2023-04-03 01:14:32,744 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__role__highWaterSensor with input of size 113 for LOIs [2023-04-03 01:14:33,790 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterLevel with input of size 111 for LOIs [2023-04-03 01:14:34,282 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterSensorDry with input of size 111 for LOIs [2023-04-03 01:14:34,299 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump with input of size 117 for LOIs [2023-04-03 01:14:34,376 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 93 for LOIs [2023-04-03 01:14:34,384 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 174 for LOIs [2023-04-03 01:14:34,990 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 174 for LOIs [2023-04-03 01:14:35,016 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 56 for LOIs [2023-04-03 01:14:35,020 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 56 for LOIs [2023-04-03 01:14:35,653 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 146 for LOIs [2023-04-03 01:14:35,688 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification5_spec__3 with input of size 219 for LOIs [2023-04-03 01:14:37,432 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 225 for LOIs [2023-04-03 01:14:37,463 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 219 for LOIs [2023-04-03 01:14:37,494 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification5_spec__2 with input of size 216 for LOIs [2023-04-03 01:14:37,881 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 214 for LOIs [2023-04-03 01:14:37,916 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification5_spec__1 with input of size 58 for LOIs [2023-04-03 01:14:37,920 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 56 for LOIs [2023-04-03 01:14:37,924 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 44 for LOIs [2023-04-03 01:14:37,927 INFO L180 IcfgInterpreter]: Interpretation finished