/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 EqDomain -i ../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:37:53,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:37:53,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:37:53,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:37:53,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:37:53,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:37:53,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:37:53,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:37:53,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:37:53,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:37:53,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:37:53,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:37:53,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:37:53,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:37:53,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:37:53,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:37:53,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:37:53,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:37:53,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:37:53,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:37:53,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:37:53,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:37:53,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:37:53,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:37:53,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:37:53,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:37:53,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:37:53,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:37:53,977 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:37:53,978 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:37:53,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:37:53,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:37:53,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:37:53,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:37:53,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:37:53,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:37:53,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:37:53,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:37:53,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:37:53,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:37:53,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:37:53,993 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 11:37:54,022 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:37:54,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:37:54,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:37:54,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:37:54,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:37:54,024 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:37:54,024 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:37:54,024 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:37:54,024 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:37:54,025 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:37:54,025 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:37:54,025 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:37:54,026 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:37:54,026 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:37:54,026 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:37:54,026 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:37:54,026 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:37:54,026 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:37:54,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:37:54,027 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:37:54,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:37:54,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:37:54,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:37:54,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:37:54,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:37:54,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:37:54,028 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:37:54,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:37:54,028 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:37:54,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:37:54,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:37:54,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:37:54,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:37:54,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:37:54,030 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:37:54,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:37:54,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:37:54,030 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:37:54,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:37:54,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:37:54,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:37:54,030 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:37:54,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:37:54,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:37:54,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:37:54,339 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:37:54,340 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:37:54,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2023-04-01 11:37:55,513 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:37:55,849 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:37:55,849 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2023-04-01 11:37:55,871 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6731217/817f9ab4457d46db86772942e28633a4/FLAG112f93ed7 [2023-04-01 11:37:56,086 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6731217/817f9ab4457d46db86772942e28633a4 [2023-04-01 11:37:56,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:37:56,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:37:56,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:37:56,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:37:56,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:37:56,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:37:56" (1/1) ... [2023-04-01 11:37:56,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cf9e82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:56, skipping insertion in model container [2023-04-01 11:37:56,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:37:56" (1/1) ... [2023-04-01 11:37:56,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:37:56,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:37:56,306 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/elevator_spec14_product11.cil.c[3700,3713] [2023-04-01 11:37:56,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:37:56,519 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:37:56,534 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/elevator_spec14_product11.cil.c[3700,3713] [2023-04-01 11:37:56,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:37:56,649 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:37:56,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:56 WrapperNode [2023-04-01 11:37:56,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:37:56,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:37:56,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:37:56,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:37:56,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:56" (1/1) ... [2023-04-01 11:37:56,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:56" (1/1) ... [2023-04-01 11:37:56,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:56" (1/1) ... [2023-04-01 11:37:56,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:56" (1/1) ... [2023-04-01 11:37:56,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:56" (1/1) ... [2023-04-01 11:37:56,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:56" (1/1) ... [2023-04-01 11:37:56,746 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:56" (1/1) ... [2023-04-01 11:37:56,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:56" (1/1) ... [2023-04-01 11:37:56,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:37:56,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:37:56,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:37:56,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:37:56,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:56" (1/1) ... [2023-04-01 11:37:56,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:37:56,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:37:56,806 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 11:37:56,828 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 11:37:56,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:37:56,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:37:56,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 11:37:56,848 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:37:56,852 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 11:37:56,853 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 11:37:56,853 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 11:37:56,853 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 11:37:56,853 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 11:37:56,853 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 11:37:56,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 11:37:56,853 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 11:37:56,853 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 11:37:56,853 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 11:37:56,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2023-04-01 11:37:56,854 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 11:37:56,854 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 11:37:56,855 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 11:37:56,855 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 11:37:56,855 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 11:37:56,855 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 11:37:56,855 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 11:37:56,855 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 11:37:56,855 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 11:37:56,855 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 11:37:56,855 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 11:37:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 11:37:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 11:37:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 11:37:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 11:37:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 11:37:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:37:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 11:37:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 11:37:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 11:37:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 11:37:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 11:37:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 11:37:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 11:37:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 11:37:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 11:37:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 11:37:56,858 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 11:37:56,858 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 11:37:56,858 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 11:37:56,859 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 11:37:56,859 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 11:37:56,859 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 11:37:56,860 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 11:37:56,860 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 11:37:56,860 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 11:37:56,860 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 11:37:56,860 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 11:37:56,860 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 11:37:56,861 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 11:37:56,861 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 11:37:56,861 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 11:37:56,861 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 11:37:56,862 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 11:37:56,862 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 11:37:56,863 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 11:37:56,863 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-01 11:37:56,863 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 11:37:56,863 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 11:37:56,863 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 11:37:56,863 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-01 11:37:56,863 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 11:37:56,863 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 11:37:56,863 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 11:37:56,864 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 11:37:56,864 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 11:37:56,864 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 11:37:56,864 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-01 11:37:56,864 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-01 11:37:56,864 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 11:37:56,864 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:37:56,864 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:37:56,864 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:37:56,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:37:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:37:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 11:37:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 11:37:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 11:37:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 11:37:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 11:37:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 11:37:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 11:37:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 11:37:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 11:37:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 11:37:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 11:37:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 11:37:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 11:37:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 11:37:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 11:37:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 11:37:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 11:37:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 11:37:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 11:37:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 11:37:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 11:37:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 11:37:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 11:37:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 11:37:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:37:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 11:37:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 11:37:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 11:37:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 11:37:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 11:37:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:37:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 11:37:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 11:37:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:37:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 11:37:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 11:37:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:37:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 11:37:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 11:37:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 11:37:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 11:37:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 11:37:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 11:37:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 11:37:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-01 11:37:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 11:37:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 11:37:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-01 11:37:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 11:37:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 11:37:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 11:37:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 11:37:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:37:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:37:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:37:57,067 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:37:57,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:37:58,473 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:37:59,325 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:37:59,326 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 11:37:59,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:37:59 BoogieIcfgContainer [2023-04-01 11:37:59,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:37:59,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:37:59,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:37:59,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:37:59,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:37:56" (1/3) ... [2023-04-01 11:37:59,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee30810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:37:59, skipping insertion in model container [2023-04-01 11:37:59,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:56" (2/3) ... [2023-04-01 11:37:59,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee30810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:37:59, skipping insertion in model container [2023-04-01 11:37:59,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:37:59" (3/3) ... [2023-04-01 11:37:59,338 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product11.cil.c [2023-04-01 11:37:59,356 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:37:59,356 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:37:59,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:37:59,416 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;@204f4ae8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:37:59,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:37:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand has 535 states, 310 states have (on average 1.4741935483870967) internal successors, (457), 333 states have internal predecessors, (457), 165 states have call successors, (165), 48 states have call predecessors, (165), 48 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) [2023-04-01 11:37:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 11:37:59,440 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:37:59,441 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:37:59,441 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:37:59,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:37:59,446 INFO L85 PathProgramCache]: Analyzing trace with hash 480599728, now seen corresponding path program 1 times [2023-04-01 11:37:59,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:37:59,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342716835] [2023-04-01 11:37:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:37:59,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:37:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 11:38:00,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:00,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342716835] [2023-04-01 11:38:00,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342716835] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:00,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:38:00,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:38:00,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067241065] [2023-04-01 11:38:00,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:00,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:38:00,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:00,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:38:00,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:38:00,581 INFO L87 Difference]: Start difference. First operand has 535 states, 310 states have (on average 1.4741935483870967) internal successors, (457), 333 states have internal predecessors, (457), 165 states have call successors, (165), 48 states have call predecessors, (165), 48 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-04-01 11:38:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:01,436 INFO L93 Difference]: Finished difference Result 1207 states and 1831 transitions. [2023-04-01 11:38:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:38:01,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 110 [2023-04-01 11:38:01,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:01,468 INFO L225 Difference]: With dead ends: 1207 [2023-04-01 11:38:01,468 INFO L226 Difference]: Without dead ends: 794 [2023-04-01 11:38:01,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:38:01,485 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 593 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 2403 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:01,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 2403 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 11:38:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2023-04-01 11:38:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 787. [2023-04-01 11:38:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 500 states have (on average 1.514) internal successors, (757), 529 states have internal predecessors, (757), 212 states have call successors, (212), 79 states have call predecessors, (212), 74 states have return successors, (215), 202 states have call predecessors, (215), 206 states have call successors, (215) [2023-04-01 11:38:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1184 transitions. [2023-04-01 11:38:01,629 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1184 transitions. Word has length 110 [2023-04-01 11:38:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:01,630 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 1184 transitions. [2023-04-01 11:38:01,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-04-01 11:38:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1184 transitions. [2023-04-01 11:38:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 11:38:01,636 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:01,636 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:38:01,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:38:01,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:01,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:01,637 INFO L85 PathProgramCache]: Analyzing trace with hash 536041611, now seen corresponding path program 1 times [2023-04-01 11:38:01,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:01,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607893522] [2023-04-01 11:38:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:01,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 11:38:02,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:02,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607893522] [2023-04-01 11:38:02,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607893522] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:02,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:38:02,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:38:02,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649073780] [2023-04-01 11:38:02,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:02,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:38:02,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:38:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:38:02,411 INFO L87 Difference]: Start difference. First operand 787 states and 1184 transitions. Second operand has 7 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 11:38:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:03,219 INFO L93 Difference]: Finished difference Result 919 states and 1346 transitions. [2023-04-01 11:38:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:38:03,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 114 [2023-04-01 11:38:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:03,227 INFO L225 Difference]: With dead ends: 919 [2023-04-01 11:38:03,227 INFO L226 Difference]: Without dead ends: 916 [2023-04-01 11:38:03,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:38:03,229 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 724 mSDsluCounter, 2257 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 2971 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:03,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 2971 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 11:38:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2023-04-01 11:38:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 908. [2023-04-01 11:38:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 570 states have (on average 1.4736842105263157) internal successors, (840), 598 states have internal predecessors, (840), 242 states have call successors, (242), 100 states have call predecessors, (242), 95 states have return successors, (252), 233 states have call predecessors, (252), 235 states have call successors, (252) [2023-04-01 11:38:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1334 transitions. [2023-04-01 11:38:03,282 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1334 transitions. Word has length 114 [2023-04-01 11:38:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:03,283 INFO L495 AbstractCegarLoop]: Abstraction has 908 states and 1334 transitions. [2023-04-01 11:38:03,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 11:38:03,283 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1334 transitions. [2023-04-01 11:38:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-01 11:38:03,288 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:03,288 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:38:03,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:38:03,288 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:03,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:03,289 INFO L85 PathProgramCache]: Analyzing trace with hash -223181380, now seen corresponding path program 1 times [2023-04-01 11:38:03,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:03,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912766844] [2023-04-01 11:38:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:03,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 11:38:03,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:03,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912766844] [2023-04-01 11:38:03,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912766844] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:03,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:38:03,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:38:03,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992152168] [2023-04-01 11:38:03,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:03,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:38:03,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:03,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:38:03,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:38:03,604 INFO L87 Difference]: Start difference. First operand 908 states and 1334 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-01 11:38:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:03,752 INFO L93 Difference]: Finished difference Result 1795 states and 2655 transitions. [2023-04-01 11:38:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:38:03,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) Word has length 150 [2023-04-01 11:38:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:03,758 INFO L225 Difference]: With dead ends: 1795 [2023-04-01 11:38:03,759 INFO L226 Difference]: Without dead ends: 918 [2023-04-01 11:38:03,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:38:03,764 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 10 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:03,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2279 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:38:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-04-01 11:38:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 918. [2023-04-01 11:38:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 577 states have (on average 1.4679376083188909) internal successors, (847), 606 states have internal predecessors, (847), 242 states have call successors, (242), 100 states have call predecessors, (242), 98 states have return successors, (255), 235 states have call predecessors, (255), 235 states have call successors, (255) [2023-04-01 11:38:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1344 transitions. [2023-04-01 11:38:03,812 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1344 transitions. Word has length 150 [2023-04-01 11:38:03,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:03,813 INFO L495 AbstractCegarLoop]: Abstraction has 918 states and 1344 transitions. [2023-04-01 11:38:03,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-01 11:38:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1344 transitions. [2023-04-01 11:38:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-01 11:38:03,817 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:03,817 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:38:03,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 11:38:03,818 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:03,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:03,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1011699390, now seen corresponding path program 1 times [2023-04-01 11:38:03,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:03,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373111428] [2023-04-01 11:38:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:03,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-04-01 11:38:04,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:04,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373111428] [2023-04-01 11:38:04,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373111428] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:04,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136381692] [2023-04-01 11:38:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:04,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:04,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:04,141 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 11:38:04,188 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 11:38:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:04,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 2560 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 11:38:04,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 11:38:04,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:04,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136381692] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:04,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:04,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-01 11:38:04,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420724987] [2023-04-01 11:38:04,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:04,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:38:04,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:04,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:38:04,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:38:04,845 INFO L87 Difference]: Start difference. First operand 918 states and 1344 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:05,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:05,117 INFO L93 Difference]: Finished difference Result 1883 states and 2821 transitions. [2023-04-01 11:38:05,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:38:05,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 155 [2023-04-01 11:38:05,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:05,126 INFO L225 Difference]: With dead ends: 1883 [2023-04-01 11:38:05,126 INFO L226 Difference]: Without dead ends: 996 [2023-04-01 11:38:05,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 11:38:05,137 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 213 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:05,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1503 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:38:05,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2023-04-01 11:38:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 996. [2023-04-01 11:38:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 653 states have (on average 1.5206738131699846) internal successors, (993), 682 states have internal predecessors, (993), 242 states have call successors, (242), 102 states have call predecessors, (242), 100 states have return successors, (255), 235 states have call predecessors, (255), 235 states have call successors, (255) [2023-04-01 11:38:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1490 transitions. [2023-04-01 11:38:05,191 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1490 transitions. Word has length 155 [2023-04-01 11:38:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:05,193 INFO L495 AbstractCegarLoop]: Abstraction has 996 states and 1490 transitions. [2023-04-01 11:38:05,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1490 transitions. [2023-04-01 11:38:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-01 11:38:05,198 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:05,199 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:38:05,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 11:38:05,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:05,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:05,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1121847454, now seen corresponding path program 1 times [2023-04-01 11:38:05,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:05,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534042909] [2023-04-01 11:38:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:05,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-04-01 11:38:05,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:05,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534042909] [2023-04-01 11:38:05,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534042909] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:05,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622491226] [2023-04-01 11:38:05,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:05,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:05,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:05,643 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 11:38:05,666 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 11:38:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:06,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 2565 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 11:38:06,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 11:38:06,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:06,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622491226] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:06,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:06,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-01 11:38:06,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557502965] [2023-04-01 11:38:06,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:06,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:38:06,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:06,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:38:06,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:38:06,195 INFO L87 Difference]: Start difference. First operand 996 states and 1490 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:06,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:06,495 INFO L93 Difference]: Finished difference Result 2039 states and 3111 transitions. [2023-04-01 11:38:06,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:38:06,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 160 [2023-04-01 11:38:06,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:06,503 INFO L225 Difference]: With dead ends: 2039 [2023-04-01 11:38:06,503 INFO L226 Difference]: Without dead ends: 1074 [2023-04-01 11:38:06,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:38:06,508 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 211 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:06,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1503 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:38:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2023-04-01 11:38:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1074. [2023-04-01 11:38:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 729 states have (on average 1.5624142661179699) internal successors, (1139), 758 states have internal predecessors, (1139), 242 states have call successors, (242), 104 states have call predecessors, (242), 102 states have return successors, (255), 235 states have call predecessors, (255), 235 states have call successors, (255) [2023-04-01 11:38:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1636 transitions. [2023-04-01 11:38:06,550 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1636 transitions. Word has length 160 [2023-04-01 11:38:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:06,550 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1636 transitions. [2023-04-01 11:38:06,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1636 transitions. [2023-04-01 11:38:06,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-01 11:38:06,554 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:06,554 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:38:06,567 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 11:38:06,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:06,765 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:06,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:06,766 INFO L85 PathProgramCache]: Analyzing trace with hash -470364014, now seen corresponding path program 1 times [2023-04-01 11:38:06,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:06,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079386414] [2023-04-01 11:38:06,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:06,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-04-01 11:38:06,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:06,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079386414] [2023-04-01 11:38:06,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079386414] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:06,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492133615] [2023-04-01 11:38:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:06,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:06,993 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 11:38:06,997 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 11:38:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:07,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 2569 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 11:38:07,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 11:38:07,541 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:07,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492133615] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:07,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:07,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-01 11:38:07,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669271089] [2023-04-01 11:38:07,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:07,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:38:07,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:07,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:38:07,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:38:07,545 INFO L87 Difference]: Start difference. First operand 1074 states and 1636 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:07,864 INFO L93 Difference]: Finished difference Result 2195 states and 3401 transitions. [2023-04-01 11:38:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:38:07,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 164 [2023-04-01 11:38:07,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:07,871 INFO L225 Difference]: With dead ends: 2195 [2023-04-01 11:38:07,871 INFO L226 Difference]: Without dead ends: 1152 [2023-04-01 11:38:07,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:38:07,888 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 209 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:07,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1503 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:38:07,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2023-04-01 11:38:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2023-04-01 11:38:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 805 states have (on average 1.5962732919254659) internal successors, (1285), 834 states have internal predecessors, (1285), 242 states have call successors, (242), 106 states have call predecessors, (242), 104 states have return successors, (255), 235 states have call predecessors, (255), 235 states have call successors, (255) [2023-04-01 11:38:07,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1782 transitions. [2023-04-01 11:38:07,938 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1782 transitions. Word has length 164 [2023-04-01 11:38:07,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:07,939 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 1782 transitions. [2023-04-01 11:38:07,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:07,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1782 transitions. [2023-04-01 11:38:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-01 11:38:07,944 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:07,944 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:38:07,956 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 11:38:08,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:08,156 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:08,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:08,157 INFO L85 PathProgramCache]: Analyzing trace with hash -723988894, now seen corresponding path program 1 times [2023-04-01 11:38:08,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:08,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350811224] [2023-04-01 11:38:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:08,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-04-01 11:38:08,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:08,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350811224] [2023-04-01 11:38:08,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350811224] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:08,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769932779] [2023-04-01 11:38:08,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:08,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:08,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:08,436 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 11:38:08,463 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 11:38:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:08,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 2572 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 11:38:08,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 11:38:08,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:08,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769932779] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:08,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:08,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-01 11:38:08,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213518819] [2023-04-01 11:38:08,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:08,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:38:08,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:08,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:38:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:38:08,996 INFO L87 Difference]: Start difference. First operand 1152 states and 1782 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:09,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:09,259 INFO L93 Difference]: Finished difference Result 2351 states and 3691 transitions. [2023-04-01 11:38:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:38:09,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 167 [2023-04-01 11:38:09,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:09,267 INFO L225 Difference]: With dead ends: 2351 [2023-04-01 11:38:09,268 INFO L226 Difference]: Without dead ends: 1230 [2023-04-01 11:38:09,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:38:09,272 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 207 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:09,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1503 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:38:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2023-04-01 11:38:09,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1230. [2023-04-01 11:38:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 881 states have (on average 1.6242905788876276) internal successors, (1431), 910 states have internal predecessors, (1431), 242 states have call successors, (242), 108 states have call predecessors, (242), 106 states have return successors, (255), 235 states have call predecessors, (255), 235 states have call successors, (255) [2023-04-01 11:38:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1928 transitions. [2023-04-01 11:38:09,320 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1928 transitions. Word has length 167 [2023-04-01 11:38:09,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:09,320 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1928 transitions. [2023-04-01 11:38:09,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1928 transitions. [2023-04-01 11:38:09,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-04-01 11:38:09,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:09,325 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:38:09,335 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 11:38:09,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:09,535 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:09,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:09,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2465970, now seen corresponding path program 1 times [2023-04-01 11:38:09,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:09,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959997205] [2023-04-01 11:38:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:09,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-04-01 11:38:09,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:09,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959997205] [2023-04-01 11:38:09,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959997205] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:09,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:38:09,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:38:09,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401433821] [2023-04-01 11:38:09,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:09,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:38:09,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:09,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:38:09,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:38:09,742 INFO L87 Difference]: Start difference. First operand 1230 states and 1928 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 11:38:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:10,016 INFO L93 Difference]: Finished difference Result 2513 states and 3979 transitions. [2023-04-01 11:38:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:38:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 169 [2023-04-01 11:38:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:10,023 INFO L225 Difference]: With dead ends: 2513 [2023-04-01 11:38:10,023 INFO L226 Difference]: Without dead ends: 1298 [2023-04-01 11:38:10,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:38:10,028 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 99 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:10,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1516 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:38:10,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2023-04-01 11:38:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1298. [2023-04-01 11:38:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 947 states have (on average 1.549102428722281) internal successors, (1467), 976 states have internal predecessors, (1467), 242 states have call successors, (242), 110 states have call predecessors, (242), 108 states have return successors, (255), 235 states have call predecessors, (255), 235 states have call successors, (255) [2023-04-01 11:38:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1964 transitions. [2023-04-01 11:38:10,071 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1964 transitions. Word has length 169 [2023-04-01 11:38:10,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:10,072 INFO L495 AbstractCegarLoop]: Abstraction has 1298 states and 1964 transitions. [2023-04-01 11:38:10,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 11:38:10,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1964 transitions. [2023-04-01 11:38:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-04-01 11:38:10,076 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:10,076 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:38:10,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 11:38:10,077 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:10,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:10,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1147207073, now seen corresponding path program 1 times [2023-04-01 11:38:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:10,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307528841] [2023-04-01 11:38:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:10,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-04-01 11:38:10,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:10,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307528841] [2023-04-01 11:38:10,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307528841] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:10,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:38:10,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:38:10,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819570563] [2023-04-01 11:38:10,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:10,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:38:10,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:10,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:38:10,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:38:10,587 INFO L87 Difference]: Start difference. First operand 1298 states and 1964 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 5 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-04-01 11:38:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:11,374 INFO L93 Difference]: Finished difference Result 2761 states and 4218 transitions. [2023-04-01 11:38:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 11:38:11,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 5 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 169 [2023-04-01 11:38:11,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:11,383 INFO L225 Difference]: With dead ends: 2761 [2023-04-01 11:38:11,383 INFO L226 Difference]: Without dead ends: 1251 [2023-04-01 11:38:11,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-04-01 11:38:11,389 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 810 mSDsluCounter, 2827 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 3472 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:11,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 3472 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 11:38:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2023-04-01 11:38:11,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1235. [2023-04-01 11:38:11,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 835 states have (on average 1.4431137724550898) internal successors, (1205), 872 states have internal predecessors, (1205), 277 states have call successors, (277), 124 states have call predecessors, (277), 122 states have return successors, (302), 267 states have call predecessors, (302), 270 states have call successors, (302) [2023-04-01 11:38:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1784 transitions. [2023-04-01 11:38:11,440 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1784 transitions. Word has length 169 [2023-04-01 11:38:11,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:11,441 INFO L495 AbstractCegarLoop]: Abstraction has 1235 states and 1784 transitions. [2023-04-01 11:38:11,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 5 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-04-01 11:38:11,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1784 transitions. [2023-04-01 11:38:11,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 11:38:11,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:11,445 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:38:11,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 11:38:11,445 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:11,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:11,446 INFO L85 PathProgramCache]: Analyzing trace with hash 189099810, now seen corresponding path program 1 times [2023-04-01 11:38:11,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:11,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953541607] [2023-04-01 11:38:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:11,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-01 11:38:15,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953541607] [2023-04-01 11:38:15,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953541607] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716497072] [2023-04-01 11:38:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:15,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:15,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:15,989 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 11:38:15,994 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 11:38:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:16,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 2575 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 11:38:16,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-04-01 11:38:17,871 INFO L327 TraceCheckSpWp]: Computing backward predicates...