/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_spec2_product50.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:56:12,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:56:12,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:56:12,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:56:12,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:56:12,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:56:12,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:56:12,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:56:12,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:56:12,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:56:12,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:56:12,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:56:12,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:56:12,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:56:12,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:56:12,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:56:12,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:56:12,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:56:12,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:56:12,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:56:12,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:56:12,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:56:12,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:56:12,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:56:12,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:56:12,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:56:12,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:56:12,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:56:12,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:56:12,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:56:12,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:56:12,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:56:12,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:56:12,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:56:12,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:56:12,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:56:12,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:56:12,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:56:12,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:56:12,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:56:12,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:56:12,178 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 [2023-04-01 05:56:12,194 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:56:12,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:56:12,195 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:56:12,195 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:56:12,196 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:56:12,196 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:56:12,196 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:56:12,196 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:56:12,196 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:56:12,197 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:56:12,197 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:56:12,197 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:56:12,197 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:56:12,197 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:56:12,197 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:56:12,197 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:56:12,197 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:56:12,198 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:56:12,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:56:12,198 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:56:12,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:56:12,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:56:12,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:56:12,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:56:12,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:56:12,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:56:12,199 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:56:12,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:56:12,199 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:56:12,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:56:12,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:56:12,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:56:12,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:56:12,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:56:12,200 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:56:12,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:56:12,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:56:12,201 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:56:12,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:56:12,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:56:12,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:56:12,201 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:56:12,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:56:12,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:56:12,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:56:12,432 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:56:12,433 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:56:12,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec2_product50.cil.c [2023-04-01 05:56:13,628 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:56:13,877 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:56:13,878 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec2_product50.cil.c [2023-04-01 05:56:13,905 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a7b89916/c1aea6ffa3494e81af857d044d75cbd0/FLAG1d85f2b0f [2023-04-01 05:56:13,920 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a7b89916/c1aea6ffa3494e81af857d044d75cbd0 [2023-04-01 05:56:13,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:56:13,925 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:56:13,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:56:13,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:56:13,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:56:13,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:56:13" (1/1) ... [2023-04-01 05:56:13,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@471b0e83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:56:13, skipping insertion in model container [2023-04-01 05:56:13,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:56:13" (1/1) ... [2023-04-01 05:56:13,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:56:13,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:56:14,259 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_spec2_product50.cil.c[18939,18952] [2023-04-01 05:56:14,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:56:14,278 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:56:14,365 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_spec2_product50.cil.c[18939,18952] [2023-04-01 05:56:14,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:56:14,392 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:56:14,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:56:14 WrapperNode [2023-04-01 05:56:14,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:56:14,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:56:14,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:56:14,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:56:14,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:56:14" (1/1) ... [2023-04-01 05:56:14,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:56:14" (1/1) ... [2023-04-01 05:56:14,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:56:14" (1/1) ... [2023-04-01 05:56:14,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:56:14" (1/1) ... [2023-04-01 05:56:14,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:56:14" (1/1) ... [2023-04-01 05:56:14,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:56:14" (1/1) ... [2023-04-01 05:56:14,475 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:56:14" (1/1) ... [2023-04-01 05:56:14,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:56:14" (1/1) ... [2023-04-01 05:56:14,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:56:14,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:56:14,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:56:14,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:56:14,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:56:14" (1/1) ... [2023-04-01 05:56:14,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:56:14,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:56:14,522 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) [2023-04-01 05:56:14,524 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 [2023-04-01 05:56:14,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:56:14,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:56:14,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 05:56:14,557 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:56:14,561 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 05:56:14,562 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 05:56:14,562 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 05:56:14,562 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 05:56:14,562 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 05:56:14,562 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 05:56:14,562 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 05:56:14,562 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 05:56:14,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:56:14,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2023-04-01 05:56:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2023-04-01 05:56:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2023-04-01 05:56:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-04-01 05:56:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-04-01 05:56:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-04-01 05:56:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2023-04-01 05:56:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2023-04-01 05:56:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2023-04-01 05:56:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2023-04-01 05:56:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 05:56:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-04-01 05:56:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-04-01 05:56:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2023-04-01 05:56:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2023-04-01 05:56:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-04-01 05:56:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-04-01 05:56:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-04-01 05:56:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2023-04-01 05:56:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2023-04-01 05:56:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2023-04-01 05:56:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2023-04-01 05:56:14,565 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 05:56:14,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 05:56:14,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 05:56:14,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 05:56:14,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 05:56:14,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 05:56:14,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 05:56:14,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 05:56:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:56:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:56:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:56:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:56:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:56:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 05:56:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 05:56:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 05:56:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 05:56:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 05:56:14,569 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 05:56:14,569 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 05:56:14,569 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2023-04-01 05:56:14,570 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-04-01 05:56:14,570 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-04-01 05:56:14,570 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 05:56:14,570 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 05:56:14,571 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2023-04-01 05:56:14,571 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 05:56:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 05:56:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:56:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 05:56:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-04-01 05:56:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-04-01 05:56:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2023-04-01 05:56:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2023-04-01 05:56:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2023-04-01 05:56:14,572 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2023-04-01 05:56:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2023-04-01 05:56:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2023-04-01 05:56:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2023-04-01 05:56:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-04-01 05:56:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2023-04-01 05:56:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2023-04-01 05:56:14,573 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-04-01 05:56:14,574 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2023-04-01 05:56:14,574 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-04-01 05:56:14,574 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2023-04-01 05:56:14,574 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-04-01 05:56:14,574 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 05:56:14,575 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 05:56:14,575 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 05:56:14,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 05:56:14,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 05:56:14,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:56:14,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 05:56:14,576 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 05:56:14,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:56:14,576 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 05:56:14,577 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 05:56:14,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:56:14,577 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 05:56:14,577 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 05:56:14,577 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 05:56:14,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:56:14,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:56:14,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:56:14,797 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:56:14,799 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:56:15,372 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:56:15,521 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:56:15,521 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 05:56:15,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:56:15 BoogieIcfgContainer [2023-04-01 05:56:15,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:56:15,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:56:15,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:56:15,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:56:15,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:56:13" (1/3) ... [2023-04-01 05:56:15,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c9eeab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:56:15, skipping insertion in model container [2023-04-01 05:56:15,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:56:14" (2/3) ... [2023-04-01 05:56:15,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c9eeab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:56:15, skipping insertion in model container [2023-04-01 05:56:15,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:56:15" (3/3) ... [2023-04-01 05:56:15,531 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product50.cil.c [2023-04-01 05:56:15,547 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:56:15,547 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:56:15,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:56:15,603 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;@6529c4b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:56:15,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:56:15,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 81 states have internal predecessors, (86), 47 states have call successors, (47), 30 states have call predecessors, (47), 30 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2023-04-01 05:56:15,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 05:56:15,616 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:56:15,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:56:15,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:56:15,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:56:15,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1573487955, now seen corresponding path program 1 times [2023-04-01 05:56:15,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:56:15,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449777049] [2023-04-01 05:56:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:15,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:56:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:56:15,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:56:15,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449777049] [2023-04-01 05:56:15,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449777049] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:56:15,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:56:15,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:56:15,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622224198] [2023-04-01 05:56:15,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:56:15,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:56:15,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:56:15,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:56:15,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:56:15,912 INFO L87 Difference]: Start difference. First operand has 149 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 81 states have internal predecessors, (86), 47 states have call successors, (47), 30 states have call predecessors, (47), 30 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 05:56:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:56:16,015 INFO L93 Difference]: Finished difference Result 224 states and 269 transitions. [2023-04-01 05:56:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:56:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2023-04-01 05:56:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:56:16,029 INFO L225 Difference]: With dead ends: 224 [2023-04-01 05:56:16,030 INFO L226 Difference]: Without dead ends: 114 [2023-04-01 05:56:16,034 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 [2023-04-01 05:56:16,038 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:56:16,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:56:16,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-04-01 05:56:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-04-01 05:56:16,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 68 states have internal predecessors, (71), 32 states have call successors, (32), 28 states have call predecessors, (32), 23 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2023-04-01 05:56:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2023-04-01 05:56:16,085 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 46 [2023-04-01 05:56:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:56:16,085 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2023-04-01 05:56:16,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 05:56:16,086 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2023-04-01 05:56:16,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 05:56:16,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:56:16,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:56:16,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:56:16,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:56:16,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:56:16,090 INFO L85 PathProgramCache]: Analyzing trace with hash -341509956, now seen corresponding path program 1 times [2023-04-01 05:56:16,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:56:16,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852389870] [2023-04-01 05:56:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:16,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:56:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:56:16,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:56:16,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852389870] [2023-04-01 05:56:16,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852389870] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:56:16,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:56:16,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:56:16,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495996642] [2023-04-01 05:56:16,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:56:16,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:56:16,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:56:16,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:56:16,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:56:16,259 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 05:56:16,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:56:16,316 INFO L93 Difference]: Finished difference Result 178 states and 203 transitions. [2023-04-01 05:56:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:56:16,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 47 [2023-04-01 05:56:16,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:56:16,320 INFO L225 Difference]: With dead ends: 178 [2023-04-01 05:56:16,320 INFO L226 Difference]: Without dead ends: 106 [2023-04-01 05:56:16,321 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 [2023-04-01 05:56:16,323 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 9 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:56:16,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 191 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:56:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-01 05:56:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-04-01 05:56:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 63 states have internal predecessors, (65), 29 states have call successors, (29), 27 states have call predecessors, (29), 23 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 05:56:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2023-04-01 05:56:16,334 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 47 [2023-04-01 05:56:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:56:16,335 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2023-04-01 05:56:16,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 05:56:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2023-04-01 05:56:16,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 05:56:16,337 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:56:16,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:56:16,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:56:16,337 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:56:16,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:56:16,338 INFO L85 PathProgramCache]: Analyzing trace with hash 840546823, now seen corresponding path program 1 times [2023-04-01 05:56:16,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:56:16,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817431534] [2023-04-01 05:56:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:16,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:56:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:56:16,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:56:16,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817431534] [2023-04-01 05:56:16,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817431534] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:56:16,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:56:16,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:56:16,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506935872] [2023-04-01 05:56:16,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:56:16,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:56:16,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:56:16,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:56:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:56:16,611 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 05:56:16,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:56:16,840 INFO L93 Difference]: Finished difference Result 187 states and 214 transitions. [2023-04-01 05:56:16,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:56:16,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2023-04-01 05:56:16,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:56:16,842 INFO L225 Difference]: With dead ends: 187 [2023-04-01 05:56:16,842 INFO L226 Difference]: Without dead ends: 106 [2023-04-01 05:56:16,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:56:16,844 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 108 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:56:16,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 284 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:56:16,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-01 05:56:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-04-01 05:56:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 62 states have internal predecessors, (64), 29 states have call successors, (29), 27 states have call predecessors, (29), 23 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 05:56:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2023-04-01 05:56:16,864 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 50 [2023-04-01 05:56:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:56:16,868 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2023-04-01 05:56:16,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 05:56:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2023-04-01 05:56:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 05:56:16,870 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:56:16,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:56:16,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:56:16,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:56:16,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:56:16,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2068632284, now seen corresponding path program 1 times [2023-04-01 05:56:16,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:56:16,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225393058] [2023-04-01 05:56:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:16,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:56:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:56:17,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:56:17,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225393058] [2023-04-01 05:56:17,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225393058] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:56:17,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:56:17,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:56:17,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822755665] [2023-04-01 05:56:17,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:56:17,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:56:17,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:56:17,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:56:17,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:56:17,021 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 05:56:17,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:56:17,383 INFO L93 Difference]: Finished difference Result 277 states and 327 transitions. [2023-04-01 05:56:17,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:56:17,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) Word has length 63 [2023-04-01 05:56:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:56:17,392 INFO L225 Difference]: With dead ends: 277 [2023-04-01 05:56:17,392 INFO L226 Difference]: Without dead ends: 196 [2023-04-01 05:56:17,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:56:17,401 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 144 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:56:17,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 149 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 05:56:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-04-01 05:56:17,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 179. [2023-04-01 05:56:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 96 states have (on average 1.1875) internal successors, (114), 105 states have internal predecessors, (114), 41 states have call successors, (41), 40 states have call predecessors, (41), 41 states have return successors, (44), 40 states have call predecessors, (44), 37 states have call successors, (44) [2023-04-01 05:56:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 199 transitions. [2023-04-01 05:56:17,440 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 199 transitions. Word has length 63 [2023-04-01 05:56:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:56:17,441 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 199 transitions. [2023-04-01 05:56:17,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 05:56:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 199 transitions. [2023-04-01 05:56:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 05:56:17,449 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:56:17,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:56:17,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 05:56:17,450 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:56:17,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:56:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash -422432087, now seen corresponding path program 1 times [2023-04-01 05:56:17,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:56:17,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249122567] [2023-04-01 05:56:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:17,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:56:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:56:17,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:56:17,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249122567] [2023-04-01 05:56:17,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249122567] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:56:17,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:56:17,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 05:56:17,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053229882] [2023-04-01 05:56:17,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:56:17,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:56:17,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:56:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:56:17,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:56:17,693 INFO L87 Difference]: Start difference. First operand 179 states and 199 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-01 05:56:17,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:56:17,877 INFO L93 Difference]: Finished difference Result 470 states and 538 transitions. [2023-04-01 05:56:17,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:56:17,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2023-04-01 05:56:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:56:17,883 INFO L225 Difference]: With dead ends: 470 [2023-04-01 05:56:17,883 INFO L226 Difference]: Without dead ends: 316 [2023-04-01 05:56:17,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:56:17,888 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 78 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:56:17,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 423 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:56:17,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-04-01 05:56:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 306. [2023-04-01 05:56:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 167 states have (on average 1.1616766467065869) internal successors, (194), 182 states have internal predecessors, (194), 67 states have call successors, (67), 65 states have call predecessors, (67), 71 states have return successors, (77), 69 states have call predecessors, (77), 63 states have call successors, (77) [2023-04-01 05:56:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 338 transitions. [2023-04-01 05:56:17,949 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 338 transitions. Word has length 72 [2023-04-01 05:56:17,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:56:17,950 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 338 transitions. [2023-04-01 05:56:17,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-01 05:56:17,950 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 338 transitions. [2023-04-01 05:56:17,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 05:56:17,952 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:56:17,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:56:17,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 05:56:17,952 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:56:17,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:56:17,953 INFO L85 PathProgramCache]: Analyzing trace with hash 661783035, now seen corresponding path program 1 times [2023-04-01 05:56:17,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:56:17,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870052872] [2023-04-01 05:56:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:17,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:56:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:56:18,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:56:18,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870052872] [2023-04-01 05:56:18,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870052872] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:56:18,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:56:18,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:56:18,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13346796] [2023-04-01 05:56:18,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:56:18,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:56:18,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:56:18,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:56:18,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:56:18,058 INFO L87 Difference]: Start difference. First operand 306 states and 338 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-04-01 05:56:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:56:18,129 INFO L93 Difference]: Finished difference Result 460 states and 532 transitions. [2023-04-01 05:56:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:56:18,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 75 [2023-04-01 05:56:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:56:18,132 INFO L225 Difference]: With dead ends: 460 [2023-04-01 05:56:18,133 INFO L226 Difference]: Without dead ends: 457 [2023-04-01 05:56:18,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:56:18,134 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 88 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:56:18,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 176 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:56:18,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-04-01 05:56:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2023-04-01 05:56:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 252 states have (on average 1.1666666666666667) internal successors, (294), 275 states have internal predecessors, (294), 98 states have call successors, (98), 95 states have call predecessors, (98), 106 states have return successors, (135), 103 states have call predecessors, (135), 94 states have call successors, (135) [2023-04-01 05:56:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 527 transitions. [2023-04-01 05:56:18,176 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 527 transitions. Word has length 75 [2023-04-01 05:56:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:56:18,176 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 527 transitions. [2023-04-01 05:56:18,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-04-01 05:56:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 527 transitions. [2023-04-01 05:56:18,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-01 05:56:18,179 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:56:18,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 05:56:18,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 05:56:18,179 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:56:18,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:56:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash -290320110, now seen corresponding path program 1 times [2023-04-01 05:56:18,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:56:18,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979793470] [2023-04-01 05:56:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:18,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:56:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 05:56:18,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:56:18,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979793470] [2023-04-01 05:56:18,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979793470] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:56:18,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497583397] [2023-04-01 05:56:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:18,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:56:18,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:56:18,465 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) [2023-04-01 05:56:18,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:56:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:18,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 05:56:18,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:56:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:56:18,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:56:18,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497583397] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:56:18,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:56:18,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2023-04-01 05:56:18,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673457845] [2023-04-01 05:56:18,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:56:18,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:56:18,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:56:18,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:56:18,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:56:18,766 INFO L87 Difference]: Start difference. First operand 457 states and 527 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 05:56:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:56:18,931 INFO L93 Difference]: Finished difference Result 742 states and 870 transitions. [2023-04-01 05:56:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:56:18,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 124 [2023-04-01 05:56:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:56:18,935 INFO L225 Difference]: With dead ends: 742 [2023-04-01 05:56:18,935 INFO L226 Difference]: Without dead ends: 437 [2023-04-01 05:56:18,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-04-01 05:56:18,937 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 62 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:56:18,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 486 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:56:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-04-01 05:56:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 418. [2023-04-01 05:56:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 229 states have (on average 1.1528384279475983) internal successors, (264), 250 states have internal predecessors, (264), 90 states have call successors, (90), 88 states have call predecessors, (90), 98 states have return successors, (115), 93 states have call predecessors, (115), 86 states have call successors, (115) [2023-04-01 05:56:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 469 transitions. [2023-04-01 05:56:18,973 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 469 transitions. Word has length 124 [2023-04-01 05:56:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:56:18,974 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 469 transitions. [2023-04-01 05:56:18,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 05:56:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 469 transitions. [2023-04-01 05:56:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-01 05:56:18,976 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:56:18,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 05:56:18,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:56:19,183 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 [2023-04-01 05:56:19,183 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:56:19,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:56:19,184 INFO L85 PathProgramCache]: Analyzing trace with hash 287365010, now seen corresponding path program 1 times [2023-04-01 05:56:19,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:56:19,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892893972] [2023-04-01 05:56:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:19,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:56:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 05:56:19,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:56:19,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892893972] [2023-04-01 05:56:19,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892893972] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:56:19,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837964481] [2023-04-01 05:56:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:19,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:56:19,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:56:19,333 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) [2023-04-01 05:56:19,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:56:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:19,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:56:19,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:56:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:56:19,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:56:19,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837964481] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:56:19,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:56:19,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 05:56:19,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175467090] [2023-04-01 05:56:19,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:56:19,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:56:19,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:56:19,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:56:19,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:56:19,568 INFO L87 Difference]: Start difference. First operand 418 states and 469 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 05:56:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:56:19,633 INFO L93 Difference]: Finished difference Result 768 states and 864 transitions. [2023-04-01 05:56:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:56:19,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 124 [2023-04-01 05:56:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:56:19,637 INFO L225 Difference]: With dead ends: 768 [2023-04-01 05:56:19,637 INFO L226 Difference]: Without dead ends: 375 [2023-04-01 05:56:19,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:56:19,639 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 43 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:56:19,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 197 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:56:19,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-04-01 05:56:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2023-04-01 05:56:19,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 205 states have (on average 1.1365853658536584) internal successors, (233), 225 states have internal predecessors, (233), 81 states have call successors, (81), 79 states have call predecessors, (81), 88 states have return successors, (95), 84 states have call predecessors, (95), 77 states have call successors, (95) [2023-04-01 05:56:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 409 transitions. [2023-04-01 05:56:19,705 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 409 transitions. Word has length 124 [2023-04-01 05:56:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:56:19,705 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 409 transitions. [2023-04-01 05:56:19,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 05:56:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 409 transitions. [2023-04-01 05:56:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-01 05:56:19,709 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:56:19,709 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:56:19,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 05:56:19,917 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 [2023-04-01 05:56:19,917 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:56:19,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:56:19,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1834122878, now seen corresponding path program 1 times [2023-04-01 05:56:19,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:56:19,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22160060] [2023-04-01 05:56:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:19,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:56:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:56:20,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:56:20,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22160060] [2023-04-01 05:56:20,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22160060] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:56:20,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169583842] [2023-04-01 05:56:20,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:20,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:56:20,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:56:20,424 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) [2023-04-01 05:56:20,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:56:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:20,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 05:56:20,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:56:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:56:20,973 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:56:20,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169583842] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:56:20,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:56:20,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 22 [2023-04-01 05:56:20,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782958853] [2023-04-01 05:56:20,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:56:20,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 05:56:20,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:56:20,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 05:56:20,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:56:20,975 INFO L87 Difference]: Start difference. First operand 375 states and 409 transitions. Second operand has 14 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 6 states have call successors, (30), 5 states have call predecessors, (30), 7 states have return successors, (24), 7 states have call predecessors, (24), 6 states have call successors, (24) [2023-04-01 05:56:21,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:56:21,962 INFO L93 Difference]: Finished difference Result 887 states and 1013 transitions. [2023-04-01 05:56:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 05:56:21,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 6 states have call successors, (30), 5 states have call predecessors, (30), 7 states have return successors, (24), 7 states have call predecessors, (24), 6 states have call successors, (24) Word has length 127 [2023-04-01 05:56:21,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:56:21,967 INFO L225 Difference]: With dead ends: 887 [2023-04-01 05:56:21,967 INFO L226 Difference]: Without dead ends: 537 [2023-04-01 05:56:21,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 05:56:21,970 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 170 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 05:56:21,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 277 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 05:56:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-04-01 05:56:22,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 455. [2023-04-01 05:56:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 257 states have (on average 1.1361867704280155) internal successors, (292), 278 states have internal predecessors, (292), 97 states have call successors, (97), 97 states have call predecessors, (97), 100 states have return successors, (111), 96 states have call predecessors, (111), 93 states have call successors, (111) [2023-04-01 05:56:22,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 500 transitions. [2023-04-01 05:56:22,045 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 500 transitions. Word has length 127 [2023-04-01 05:56:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:56:22,045 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 500 transitions. [2023-04-01 05:56:22,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 6 states have call successors, (30), 5 states have call predecessors, (30), 7 states have return successors, (24), 7 states have call predecessors, (24), 6 states have call successors, (24) [2023-04-01 05:56:22,046 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 500 transitions. [2023-04-01 05:56:22,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-01 05:56:22,049 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:56:22,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:56:22,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 05:56:22,256 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 [2023-04-01 05:56:22,257 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:56:22,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:56:22,257 INFO L85 PathProgramCache]: Analyzing trace with hash -444909338, now seen corresponding path program 1 times [2023-04-01 05:56:22,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:56:22,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491089875] [2023-04-01 05:56:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:22,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:56:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 05:56:22,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:56:22,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491089875] [2023-04-01 05:56:22,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491089875] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:56:22,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356902902] [2023-04-01 05:56:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:22,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:56:22,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:56:22,978 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) [2023-04-01 05:56:22,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 05:56:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:23,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-01 05:56:23,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:56:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:56:23,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:56:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 05:56:24,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356902902] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:56:24,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834526020] [2023-04-01 05:56:24,419 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2023-04-01 05:56:24,419 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:56:24,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:56:24,428 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:56:24,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:56:24,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 31 for LOIs [2023-04-01 05:56:24,749 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 36 for LOIs [2023-04-01 05:56:25,027 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 36 for LOIs [2023-04-01 05:56:25,092 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 36 for LOIs [2023-04-01 05:56:32,993 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 67 for LOIs [2023-04-01 05:56:33,004 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 40 for LOIs [2023-04-01 05:56:33,309 INFO L197 IcfgInterpreter]: Interpreting procedure lowerWaterLevel with input of size 38 for LOIs [2023-04-01 05:56:33,314 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification2_spec__2 with input of size 34 for LOIs [2023-04-01 05:56:33,392 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 34 for LOIs [2023-04-01 05:56:33,395 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 42 for LOIs [2023-04-01 05:56:33,399 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 32 for LOIs [2023-04-01 05:56:33,402 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment with input of size 41 for LOIs [2023-04-01 05:56:33,584 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 39 for LOIs [2023-04-01 05:56:33,769 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterLevel with input of size 34 for LOIs [2023-04-01 05:56:33,864 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterSensorDry with input of size 34 for LOIs [2023-04-01 05:56:33,871 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump with input of size 46 for LOIs [2023-04-01 05:56:33,879 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 35 for LOIs [2023-04-01 05:56:33,882 INFO L197 IcfgInterpreter]: Interpreting procedure isLowWaterLevel with input of size 35 for LOIs [2023-04-01 05:56:33,948 INFO L197 IcfgInterpreter]: Interpreting procedure isLowWaterSensorDry with input of size 35 for LOIs [2023-04-01 05:56:33,953 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 66 for LOIs [2023-04-01 05:56:33,962 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification2_spec__1 with input of size 28 for LOIs [2023-04-01 05:56:33,964 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 26 for LOIs [2023-04-01 05:56:33,966 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 26 for LOIs [2023-04-01 05:56:33,967 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 26 for LOIs [2023-04-01 05:56:33,969 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 26 for LOIs [2023-04-01 05:56:33,970 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:56:41,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11914#(and (<= ~methaneLevelCritical~0 1) (<= 1 ~methaneLevelCritical~0) (not (= ~pumpRunning~0 0)) (<= ~pumpRunning~0 2147483647) (= ~head~0.offset 0) (= 1 ~systemActive~0) (<= ~methaneLevelCritical~0 |#StackHeapBarrier|) (<= 0 ~methAndRunningLastTime~0) (= ~head~0.base 0) (<= 0 (+ ~pumpRunning~0 2147483648)) (= |#NULL.offset| 0) (not (= ~methAndRunningLastTime~0 0)) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2023-04-01 05:56:41,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:56:41,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:56:41,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 37 [2023-04-01 05:56:41,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468223017] [2023-04-01 05:56:41,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:56:41,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-01 05:56:41,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:56:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-01 05:56:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=8277, Unknown=0, NotChecked=0, Total=8930 [2023-04-01 05:56:41,658 INFO L87 Difference]: Start difference. First operand 455 states and 500 transitions. Second operand has 37 states, 25 states have (on average 4.52) internal successors, (113), 28 states have internal predecessors, (113), 11 states have call successors, (61), 11 states have call predecessors, (61), 21 states have return successors, (54), 18 states have call predecessors, (54), 11 states have call successors, (54) [2023-04-01 05:56:43,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:56:43,857 INFO L93 Difference]: Finished difference Result 1748 states and 2094 transitions. [2023-04-01 05:56:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 05:56:43,857 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 25 states have (on average 4.52) internal successors, (113), 28 states have internal predecessors, (113), 11 states have call successors, (61), 11 states have call predecessors, (61), 21 states have return successors, (54), 18 states have call predecessors, (54), 11 states have call successors, (54) Word has length 130 [2023-04-01 05:56:43,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:56:43,864 INFO L225 Difference]: With dead ends: 1748 [2023-04-01 05:56:43,864 INFO L226 Difference]: Without dead ends: 1318 [2023-04-01 05:56:43,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 307 SyntacticMatches, 18 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6088 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=950, Invalid=11482, Unknown=0, NotChecked=0, Total=12432 [2023-04-01 05:56:43,870 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 1068 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 905 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 4014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 905 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 05:56:43,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 662 Invalid, 4014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [905 Valid, 3109 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 05:56:43,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2023-04-01 05:56:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 972. [2023-04-01 05:56:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 564 states have (on average 1.1365248226950355) internal successors, (641), 602 states have internal predecessors, (641), 201 states have call successors, (201), 201 states have call predecessors, (201), 206 states have return successors, (229), 202 states have call predecessors, (229), 197 states have call successors, (229) [2023-04-01 05:56:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1071 transitions. [2023-04-01 05:56:43,951 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1071 transitions. Word has length 130 [2023-04-01 05:56:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:56:43,951 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1071 transitions. [2023-04-01 05:56:43,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 25 states have (on average 4.52) internal successors, (113), 28 states have internal predecessors, (113), 11 states have call successors, (61), 11 states have call predecessors, (61), 21 states have return successors, (54), 18 states have call predecessors, (54), 11 states have call successors, (54) [2023-04-01 05:56:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1071 transitions. [2023-04-01 05:56:43,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-04-01 05:56:43,954 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:56:43,955 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 05:56:43,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 05:56:44,163 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 [2023-04-01 05:56:44,163 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:56:44,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:56:44,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1098546284, now seen corresponding path program 1 times [2023-04-01 05:56:44,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:56:44,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872663486] [2023-04-01 05:56:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:44,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:56:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 53 proven. 15 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-04-01 05:56:44,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:56:44,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872663486] [2023-04-01 05:56:44,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872663486] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:56:44,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982382476] [2023-04-01 05:56:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:56:44,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:56:44,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:56:44,541 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) [2023-04-01 05:56:44,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 05:56:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:56:44,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 58 conjunts are in the unsatisfiable core [2023-04-01 05:56:44,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:56:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 122 proven. 33 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 05:56:45,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:56:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 86 proven. 18 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 05:56:46,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982382476] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:56:46,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246399822] [2023-04-01 05:56:46,661 INFO L159 IcfgInterpreter]: Started Sifa with 102 locations of interest [2023-04-01 05:56:46,661 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:56:46,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:56:46,661 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:56:46,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:56:46,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 31 for LOIs [2023-04-01 05:56:46,800 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 36 for LOIs [2023-04-01 05:56:46,912 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 36 for LOIs [2023-04-01 05:56:46,950 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 36 for LOIs [2023-04-01 05:56:52,126 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 41 for LOIs [2023-04-01 05:56:52,131 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 40 for LOIs [2023-04-01 05:56:52,360 INFO L197 IcfgInterpreter]: Interpreting procedure lowerWaterLevel with input of size 38 for LOIs [2023-04-01 05:56:52,364 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification2_spec__2 with input of size 34 for LOIs [2023-04-01 05:56:52,478 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 34 for LOIs [2023-04-01 05:56:52,480 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 42 for LOIs [2023-04-01 05:56:52,483 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 32 for LOIs [2023-04-01 05:56:52,485 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment with input of size 41 for LOIs [2023-04-01 05:56:52,672 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 39 for LOIs [2023-04-01 05:56:52,819 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterLevel with input of size 34 for LOIs [2023-04-01 05:56:52,885 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterSensorDry with input of size 34 for LOIs [2023-04-01 05:56:52,889 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump with input of size 46 for LOIs [2023-04-01 05:56:52,894 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 35 for LOIs [2023-04-01 05:56:52,896 INFO L197 IcfgInterpreter]: Interpreting procedure isLowWaterLevel with input of size 35 for LOIs [2023-04-01 05:56:52,946 INFO L197 IcfgInterpreter]: Interpreting procedure isLowWaterSensorDry with input of size 35 for LOIs [2023-04-01 05:56:52,949 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 45 for LOIs [2023-04-01 05:56:52,952 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 40 for LOIs [2023-04-01 05:56:52,957 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification2_spec__1 with input of size 28 for LOIs [2023-04-01 05:56:52,959 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 26 for LOIs [2023-04-01 05:56:52,960 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 26 for LOIs [2023-04-01 05:56:52,961 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 26 for LOIs [2023-04-01 05:56:52,963 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 26 for LOIs [2023-04-01 05:56:52,964 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:57:01,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17227#(and (<= ~methaneLevelCritical~0 1) (<= 1 ~methaneLevelCritical~0) (not (= ~pumpRunning~0 0)) (<= ~pumpRunning~0 2147483647) (= ~head~0.offset 0) (= 1 ~systemActive~0) (<= ~methaneLevelCritical~0 |#StackHeapBarrier|) (<= 0 ~methAndRunningLastTime~0) (= ~head~0.base 0) (<= 0 (+ ~pumpRunning~0 2147483648)) (= |#NULL.offset| 0) (not (= ~methAndRunningLastTime~0 0)) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2023-04-01 05:57:01,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:57:01,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:57:01,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 16] total 41 [2023-04-01 05:57:01,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344222025] [2023-04-01 05:57:01,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:57:01,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-01 05:57:01,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:57:01,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-01 05:57:01,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=9279, Unknown=0, NotChecked=0, Total=9900 [2023-04-01 05:57:01,295 INFO L87 Difference]: Start difference. First operand 972 states and 1071 transitions. Second operand has 41 states, 32 states have (on average 5.75) internal successors, (184), 32 states have internal predecessors, (184), 17 states have call successors, (84), 12 states have call predecessors, (84), 22 states have return successors, (83), 23 states have call predecessors, (83), 17 states have call successors, (83) [2023-04-01 05:57:05,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:57:05,840 INFO L93 Difference]: Finished difference Result 1667 states and 1973 transitions. [2023-04-01 05:57:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-04-01 05:57:05,840 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 32 states have (on average 5.75) internal successors, (184), 32 states have internal predecessors, (184), 17 states have call successors, (84), 12 states have call predecessors, (84), 22 states have return successors, (83), 23 states have call predecessors, (83), 17 states have call successors, (83) Word has length 214 [2023-04-01 05:57:05,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:57:05,841 INFO L225 Difference]: With dead ends: 1667 [2023-04-01 05:57:05,841 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 05:57:05,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 545 SyntacticMatches, 25 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9949 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1953, Invalid=23487, Unknown=0, NotChecked=0, Total=25440 [2023-04-01 05:57:05,851 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1530 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 5183 mSolverCounterSat, 1641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 6824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1641 IncrementalHoareTripleChecker+Valid, 5183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 05:57:05,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1530 Valid, 849 Invalid, 6824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1641 Valid, 5183 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 05:57:05,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 05:57:05,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 05:57:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 05:57:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 05:57:05,852 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 214 [2023-04-01 05:57:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:57:05,852 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 05:57:05,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 32 states have (on average 5.75) internal successors, (184), 32 states have internal predecessors, (184), 17 states have call successors, (84), 12 states have call predecessors, (84), 22 states have return successors, (83), 23 states have call predecessors, (83), 17 states have call successors, (83) [2023-04-01 05:57:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 05:57:05,853 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 05:57:05,855 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 05:57:05,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0