/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 IntervalDomain -i ../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:33:36,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:33:36,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:33:36,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:33:36,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:33:36,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:33:36,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:33:36,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:33:36,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:33:36,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:33:36,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:33:36,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:33:36,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:33:36,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:33:36,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:33:36,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:33:36,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:33:36,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:33:36,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:33:36,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:33:36,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:33:36,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:33:36,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:33:36,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:33:36,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:33:36,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:33:36,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:33:36,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:33:36,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:33:36,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:33:36,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:33:36,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:33:36,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:33:36,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:33:36,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:33:36,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:33:36,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:33:36,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:33:36,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:33:36,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:33:36,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:33:36,141 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 [2023-03-31 23:33:36,171 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:33:36,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:33:36,172 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:33:36,172 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:33:36,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:33:36,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:33:36,173 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:33:36,173 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:33:36,173 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:33:36,173 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:33:36,174 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:33:36,174 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:33:36,174 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:33:36,174 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:33:36,174 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:33:36,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:33:36,175 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:33:36,175 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:33:36,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:33:36,175 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:33:36,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:33:36,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:33:36,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:33:36,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:33:36,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:33:36,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:33:36,176 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:33:36,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:33:36,176 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:33:36,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:33:36,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:33:36,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:33:36,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:33:36,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:33:36,177 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:33:36,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:33:36,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:33:36,178 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:33:36,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:33:36,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:33:36,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:33:36,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:33:36,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:33:36,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:33:36,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:33:36,437 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:33:36,438 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:33:36,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2023-03-31 23:33:37,637 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:33:37,979 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:33:37,980 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2023-03-31 23:33:38,009 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d95cad1d/e7f7d514a4e0404ea59c810e8491c1fb/FLAG866dea2d4 [2023-03-31 23:33:38,020 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d95cad1d/e7f7d514a4e0404ea59c810e8491c1fb [2023-03-31 23:33:38,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:33:38,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:33:38,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:33:38,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:33:38,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:33:38,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:33:38" (1/1) ... [2023-03-31 23:33:38,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53480e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:38, skipping insertion in model container [2023-03-31 23:33:38,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:33:38" (1/1) ... [2023-03-31 23:33:38,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:33:38,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:33:38,219 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_spec1_product30.cil.c[1545,1558] [2023-03-31 23:33:38,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:33:38,581 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:33:38,594 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_spec1_product30.cil.c[1545,1558] [2023-03-31 23:33:38,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:33:38,710 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:33:38,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:38 WrapperNode [2023-03-31 23:33:38,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:33:38,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:33:38,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:33:38,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:33:38,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:38" (1/1) ... [2023-03-31 23:33:38,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:38" (1/1) ... [2023-03-31 23:33:38,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:38" (1/1) ... [2023-03-31 23:33:38,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:38" (1/1) ... [2023-03-31 23:33:38,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:38" (1/1) ... [2023-03-31 23:33:38,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:38" (1/1) ... [2023-03-31 23:33:38,830 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:38" (1/1) ... [2023-03-31 23:33:38,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:38" (1/1) ... [2023-03-31 23:33:38,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:33:38,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:33:38,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:33:38,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:33:38,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:38" (1/1) ... [2023-03-31 23:33:38,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:33:38,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:33:38,920 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) [2023-03-31 23:33:38,922 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 [2023-03-31 23:33:38,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:33:38,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:33:38,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-03-31 23:33:38,955 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:33:38,959 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-03-31 23:33:38,959 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-03-31 23:33:38,959 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-03-31 23:33:38,959 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-03-31 23:33:38,959 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-03-31 23:33:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-03-31 23:33:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-03-31 23:33:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-03-31 23:33:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-03-31 23:33:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-03-31 23:33:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-03-31 23:33:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-03-31 23:33:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-03-31 23:33:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-03-31 23:33:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-03-31 23:33:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-03-31 23:33:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-03-31 23:33:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-03-31 23:33:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-03-31 23:33:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-03-31 23:33:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-03-31 23:33:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-03-31 23:33:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-03-31 23:33:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-03-31 23:33:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-03-31 23:33:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-03-31 23:33:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-03-31 23:33:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-03-31 23:33:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-03-31 23:33:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-03-31 23:33:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:33:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-03-31 23:33:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-03-31 23:33:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-03-31 23:33:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-03-31 23:33:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-03-31 23:33:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-03-31 23:33:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-03-31 23:33:38,963 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-03-31 23:33:38,963 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-03-31 23:33:38,963 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-03-31 23:33:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-03-31 23:33:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-03-31 23:33:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-03-31 23:33:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-03-31 23:33:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-03-31 23:33:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-03-31 23:33:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-03-31 23:33:38,966 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-03-31 23:33:38,966 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-03-31 23:33:38,966 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-03-31 23:33:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-03-31 23:33:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-03-31 23:33:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-03-31 23:33:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-03-31 23:33:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-03-31 23:33:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-03-31 23:33:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-03-31 23:33:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-03-31 23:33:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-03-31 23:33:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-03-31 23:33:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-03-31 23:33:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-03-31 23:33:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-03-31 23:33:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-03-31 23:33:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-03-31 23:33:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-03-31 23:33:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2023-03-31 23:33:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-03-31 23:33:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2023-03-31 23:33:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-03-31 23:33:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-03-31 23:33:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2023-03-31 23:33:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2023-03-31 23:33:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2023-03-31 23:33:38,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2023-03-31 23:33:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:33:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:33:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:33:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:33:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:33:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-03-31 23:33:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-03-31 23:33:38,973 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-03-31 23:33:38,973 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-03-31 23:33:38,973 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-03-31 23:33:38,973 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-03-31 23:33:38,973 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-03-31 23:33:38,973 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-03-31 23:33:38,973 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-03-31 23:33:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-03-31 23:33:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 23:33:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 23:33:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-03-31 23:33:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 23:33:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 23:33:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:33:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 23:33:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-03-31 23:33:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:33:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-03-31 23:33:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-03-31 23:33:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:33:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-03-31 23:33:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-03-31 23:33:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-03-31 23:33:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-03-31 23:33:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-03-31 23:33:38,976 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-03-31 23:33:38,976 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-03-31 23:33:38,976 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-03-31 23:33:38,976 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-03-31 23:33:38,976 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-03-31 23:33:38,977 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-03-31 23:33:38,977 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 23:33:38,977 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-03-31 23:33:38,977 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-03-31 23:33:38,978 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-03-31 23:33:38,980 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-03-31 23:33:38,980 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-03-31 23:33:38,985 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-03-31 23:33:38,986 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-03-31 23:33:38,986 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-03-31 23:33:38,986 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-03-31 23:33:38,986 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-03-31 23:33:38,986 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-03-31 23:33:38,986 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-03-31 23:33:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-03-31 23:33:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2023-03-31 23:33:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2023-03-31 23:33:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-03-31 23:33:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:33:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-03-31 23:33:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-03-31 23:33:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-03-31 23:33:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-03-31 23:33:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-03-31 23:33:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-03-31 23:33:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-03-31 23:33:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-03-31 23:33:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-03-31 23:33:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-03-31 23:33:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-03-31 23:33:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-03-31 23:33:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-03-31 23:33:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-03-31 23:33:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-03-31 23:33:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-03-31 23:33:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-03-31 23:33:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-03-31 23:33:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-03-31 23:33:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2023-03-31 23:33:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2023-03-31 23:33:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2023-03-31 23:33:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-03-31 23:33:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:33:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:33:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:33:39,241 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:33:39,246 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:33:40,532 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:33:41,399 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:33:41,400 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-03-31 23:33:41,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:33:41 BoogieIcfgContainer [2023-03-31 23:33:41,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:33:41,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:33:41,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:33:41,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:33:41,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:33:38" (1/3) ... [2023-03-31 23:33:41,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596a3084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:33:41, skipping insertion in model container [2023-03-31 23:33:41,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:33:38" (2/3) ... [2023-03-31 23:33:41,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596a3084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:33:41, skipping insertion in model container [2023-03-31 23:33:41,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:33:41" (3/3) ... [2023-03-31 23:33:41,415 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product30.cil.c [2023-03-31 23:33:41,432 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:33:41,432 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:33:41,504 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:33:41,510 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;@35e684f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:33:41,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:33:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 343 states have (on average 1.4810495626822158) internal successors, (508), 372 states have internal predecessors, (508), 180 states have call successors, (180), 54 states have call predecessors, (180), 54 states have return successors, (180), 170 states have call predecessors, (180), 180 states have call successors, (180) [2023-03-31 23:33:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-03-31 23:33:41,544 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:33:41,545 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:33:41,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:33:41,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:33:41,552 INFO L85 PathProgramCache]: Analyzing trace with hash 976115706, now seen corresponding path program 1 times [2023-03-31 23:33:41,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:33:41,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279629436] [2023-03-31 23:33:41,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:33:41,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:33:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:33:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:33:42,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:33:42,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279629436] [2023-03-31 23:33:42,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279629436] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:33:42,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:33:42,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 23:33:42,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18521438] [2023-03-31 23:33:42,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:33:42,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:33:42,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:33:42,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:33:42,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:33:42,898 INFO L87 Difference]: Start difference. First operand has 590 states, 343 states have (on average 1.4810495626822158) internal successors, (508), 372 states have internal predecessors, (508), 180 states have call successors, (180), 54 states have call predecessors, (180), 54 states have return successors, (180), 170 states have call predecessors, (180), 180 states have call successors, (180) Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2023-03-31 23:33:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:33:45,349 INFO L93 Difference]: Finished difference Result 1400 states and 2158 transitions. [2023-03-31 23:33:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:33:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 97 [2023-03-31 23:33:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:33:45,410 INFO L225 Difference]: With dead ends: 1400 [2023-03-31 23:33:45,411 INFO L226 Difference]: Without dead ends: 969 [2023-03-31 23:33:45,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:33:45,424 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 2172 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 985 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2252 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 2750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 985 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:33:45,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2252 Valid, 469 Invalid, 2750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [985 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-03-31 23:33:45,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2023-03-31 23:33:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 878. [2023-03-31 23:33:45,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 579 states have (on average 1.5561312607944733) internal successors, (901), 609 states have internal predecessors, (901), 222 states have call successors, (222), 77 states have call predecessors, (222), 76 states have return successors, (224), 201 states have call predecessors, (224), 214 states have call successors, (224) [2023-03-31 23:33:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1347 transitions. [2023-03-31 23:33:45,542 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1347 transitions. Word has length 97 [2023-03-31 23:33:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:33:45,542 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 1347 transitions. [2023-03-31 23:33:45,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2023-03-31 23:33:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1347 transitions. [2023-03-31 23:33:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-03-31 23:33:45,549 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:33:45,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:33:45,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:33:45,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:33:45,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:33:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1047118110, now seen corresponding path program 1 times [2023-03-31 23:33:45,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:33:45,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29884079] [2023-03-31 23:33:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:33:45,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:33:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:33:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 23:33:46,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:33:46,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29884079] [2023-03-31 23:33:46,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29884079] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:33:46,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:33:46,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-03-31 23:33:46,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941004372] [2023-03-31 23:33:46,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:33:46,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:33:46,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:33:46,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:33:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:33:46,440 INFO L87 Difference]: Start difference. First operand 878 states and 1347 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 6 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (28), 7 states have call predecessors, (28), 5 states have call successors, (28) [2023-03-31 23:33:49,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:33:49,878 INFO L93 Difference]: Finished difference Result 2824 states and 4413 transitions. [2023-03-31 23:33:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-31 23:33:49,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 6 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (28), 7 states have call predecessors, (28), 5 states have call successors, (28) Word has length 140 [2023-03-31 23:33:49,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:33:49,893 INFO L225 Difference]: With dead ends: 2824 [2023-03-31 23:33:49,894 INFO L226 Difference]: Without dead ends: 2000 [2023-03-31 23:33:49,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-03-31 23:33:49,900 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1825 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 5329 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1902 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 5932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 5329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:33:49,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1902 Valid, 987 Invalid, 5932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 5329 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 23:33:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2023-03-31 23:33:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1949. [2023-03-31 23:33:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1329 states have (on average 1.5733634311512414) internal successors, (2091), 1381 states have internal predecessors, (2091), 457 states have call successors, (457), 148 states have call predecessors, (457), 162 states have return successors, (499), 439 states have call predecessors, (499), 449 states have call successors, (499) [2023-03-31 23:33:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 3047 transitions. [2023-03-31 23:33:50,033 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 3047 transitions. Word has length 140 [2023-03-31 23:33:50,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:33:50,034 INFO L495 AbstractCegarLoop]: Abstraction has 1949 states and 3047 transitions. [2023-03-31 23:33:50,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 6 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (28), 7 states have call predecessors, (28), 5 states have call successors, (28) [2023-03-31 23:33:50,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 3047 transitions. [2023-03-31 23:33:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-03-31 23:33:50,043 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:33:50,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:33:50,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:33:50,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:33:50,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:33:50,044 INFO L85 PathProgramCache]: Analyzing trace with hash -803227421, now seen corresponding path program 1 times [2023-03-31 23:33:50,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:33:50,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773923278] [2023-03-31 23:33:50,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:33:50,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:33:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:33:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 23:33:50,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:33:50,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773923278] [2023-03-31 23:33:50,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773923278] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:33:50,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:33:50,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-03-31 23:33:50,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216950679] [2023-03-31 23:33:50,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:33:50,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 23:33:50,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:33:50,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 23:33:50,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:33:50,939 INFO L87 Difference]: Start difference. First operand 1949 states and 3047 transitions. Second operand has 12 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 6 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (29), 8 states have call predecessors, (29), 5 states have call successors, (29) [2023-03-31 23:33:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:33:55,396 INFO L93 Difference]: Finished difference Result 5020 states and 7854 transitions. [2023-03-31 23:33:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-03-31 23:33:55,397 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 6 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (29), 8 states have call predecessors, (29), 5 states have call successors, (29) Word has length 143 [2023-03-31 23:33:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:33:55,418 INFO L225 Difference]: With dead ends: 5020 [2023-03-31 23:33:55,418 INFO L226 Difference]: Without dead ends: 3124 [2023-03-31 23:33:55,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2023-03-31 23:33:55,431 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1234 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 9094 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 9689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 9094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-03-31 23:33:55,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1282 Valid, 1247 Invalid, 9689 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [595 Valid, 9094 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-03-31 23:33:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2023-03-31 23:33:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 3055. [2023-03-31 23:33:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3055 states, 2104 states have (on average 1.5655893536121672) internal successors, (3294), 2170 states have internal predecessors, (3294), 691 states have call successors, (691), 228 states have call predecessors, (691), 259 states have return successors, (771), 686 states have call predecessors, (771), 683 states have call successors, (771) [2023-03-31 23:33:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3055 states to 3055 states and 4756 transitions. [2023-03-31 23:33:55,656 INFO L78 Accepts]: Start accepts. Automaton has 3055 states and 4756 transitions. Word has length 143 [2023-03-31 23:33:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:33:55,657 INFO L495 AbstractCegarLoop]: Abstraction has 3055 states and 4756 transitions. [2023-03-31 23:33:55,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 6 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (29), 8 states have call predecessors, (29), 5 states have call successors, (29) [2023-03-31 23:33:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3055 states and 4756 transitions. [2023-03-31 23:33:55,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-03-31 23:33:55,660 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:33:55,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:33:55,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 23:33:55,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:33:55,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:33:55,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1778088233, now seen corresponding path program 1 times [2023-03-31 23:33:55,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:33:55,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882122804] [2023-03-31 23:33:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:33:55,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:33:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:33:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 23:33:56,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:33:56,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882122804] [2023-03-31 23:33:56,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882122804] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:33:56,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:33:56,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:33:56,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964677716] [2023-03-31 23:33:56,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:33:56,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:33:56,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:33:56,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:33:56,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:33:56,090 INFO L87 Difference]: Start difference. First operand 3055 states and 4756 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:33:56,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:33:56,439 INFO L93 Difference]: Finished difference Result 5369 states and 8395 transitions. [2023-03-31 23:33:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:33:56,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) Word has length 145 [2023-03-31 23:33:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:33:56,457 INFO L225 Difference]: With dead ends: 5369 [2023-03-31 23:33:56,458 INFO L226 Difference]: Without dead ends: 3167 [2023-03-31 23:33:56,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:33:56,474 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 6 mSDsluCounter, 3179 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3824 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:33:56,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3824 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:33:56,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2023-03-31 23:33:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 3125. [2023-03-31 23:33:56,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 2154 states have (on average 1.552460538532962) internal successors, (3344), 2220 states have internal predecessors, (3344), 691 states have call successors, (691), 228 states have call predecessors, (691), 279 states have return successors, (821), 706 states have call predecessors, (821), 683 states have call successors, (821) [2023-03-31 23:33:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 4856 transitions. [2023-03-31 23:33:56,681 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 4856 transitions. Word has length 145 [2023-03-31 23:33:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:33:56,684 INFO L495 AbstractCegarLoop]: Abstraction has 3125 states and 4856 transitions. [2023-03-31 23:33:56,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:33:56,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 4856 transitions. [2023-03-31 23:33:56,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-03-31 23:33:56,688 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:33:56,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:33:56,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 23:33:56,689 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:33:56,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:33:56,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1416580983, now seen corresponding path program 1 times [2023-03-31 23:33:56,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:33:56,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762877601] [2023-03-31 23:33:56,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:33:56,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:33:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:33:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 23:33:57,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:33:57,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762877601] [2023-03-31 23:33:57,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762877601] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:33:57,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:33:57,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:33:57,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923265616] [2023-03-31 23:33:57,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:33:57,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:33:57,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:33:57,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:33:57,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:33:57,092 INFO L87 Difference]: Start difference. First operand 3125 states and 4856 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:33:57,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:33:57,399 INFO L93 Difference]: Finished difference Result 5475 states and 8535 transitions. [2023-03-31 23:33:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:33:57,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) Word has length 144 [2023-03-31 23:33:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:33:57,418 INFO L225 Difference]: With dead ends: 5475 [2023-03-31 23:33:57,419 INFO L226 Difference]: Without dead ends: 3217 [2023-03-31 23:33:57,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:33:57,431 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 7 mSDsluCounter, 3160 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:33:57,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3800 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:33:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2023-03-31 23:33:57,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 3135. [2023-03-31 23:33:57,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 2164 states have (on average 1.5499075785582255) internal successors, (3354), 2220 states have internal predecessors, (3354), 691 states have call successors, (691), 228 states have call predecessors, (691), 279 states have return successors, (821), 716 states have call predecessors, (821), 683 states have call successors, (821) [2023-03-31 23:33:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 4866 transitions. [2023-03-31 23:33:57,628 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 4866 transitions. Word has length 144 [2023-03-31 23:33:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:33:57,629 INFO L495 AbstractCegarLoop]: Abstraction has 3135 states and 4866 transitions. [2023-03-31 23:33:57,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:33:57,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 4866 transitions. [2023-03-31 23:33:57,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-03-31 23:33:57,632 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:33:57,632 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:33:57,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 23:33:57,632 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:33:57,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:33:57,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1842917559, now seen corresponding path program 1 times [2023-03-31 23:33:57,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:33:57,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359698722] [2023-03-31 23:33:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:33:57,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:33:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:33:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 23:33:57,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:33:57,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359698722] [2023-03-31 23:33:57,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359698722] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:33:57,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:33:57,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:33:57,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714406345] [2023-03-31 23:33:57,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:33:57,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:33:57,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:33:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:33:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:33:57,996 INFO L87 Difference]: Start difference. First operand 3135 states and 4866 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:33:58,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:33:58,306 INFO L93 Difference]: Finished difference Result 5493 states and 8553 transitions. [2023-03-31 23:33:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:33:58,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) Word has length 145 [2023-03-31 23:33:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:33:58,326 INFO L225 Difference]: With dead ends: 5493 [2023-03-31 23:33:58,326 INFO L226 Difference]: Without dead ends: 3227 [2023-03-31 23:33:58,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:33:58,339 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 6 mSDsluCounter, 3179 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3824 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:33:58,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3824 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:33:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2023-03-31 23:33:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 3145. [2023-03-31 23:33:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 2174 states have (on average 1.547378104875805) internal successors, (3364), 2220 states have internal predecessors, (3364), 691 states have call successors, (691), 228 states have call predecessors, (691), 279 states have return successors, (821), 726 states have call predecessors, (821), 683 states have call successors, (821) [2023-03-31 23:33:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 4876 transitions. [2023-03-31 23:33:58,564 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 4876 transitions. Word has length 145 [2023-03-31 23:33:58,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:33:58,564 INFO L495 AbstractCegarLoop]: Abstraction has 3145 states and 4876 transitions. [2023-03-31 23:33:58,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) [2023-03-31 23:33:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 4876 transitions. [2023-03-31 23:33:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-03-31 23:33:58,568 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:33:58,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:33:58,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 23:33:58,569 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:33:58,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:33:58,569 INFO L85 PathProgramCache]: Analyzing trace with hash -872239393, now seen corresponding path program 1 times [2023-03-31 23:33:58,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:33:58,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511451540] [2023-03-31 23:33:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:33:58,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:33:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:33:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 23:33:59,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:33:59,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511451540] [2023-03-31 23:33:59,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511451540] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:33:59,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:33:59,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:33:59,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611755392] [2023-03-31 23:33:59,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:33:59,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:33:59,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:33:59,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:33:59,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:33:59,171 INFO L87 Difference]: Start difference. First operand 3145 states and 4876 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 7 states have call successors, (33), 5 states have call predecessors, (33), 4 states have return successors, (29), 8 states have call predecessors, (29), 6 states have call successors, (29) [2023-03-31 23:34:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:01,822 INFO L93 Difference]: Finished difference Result 7531 states and 11753 transitions. [2023-03-31 23:34:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:34:01,823 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 7 states have call successors, (33), 5 states have call predecessors, (33), 4 states have return successors, (29), 8 states have call predecessors, (29), 6 states have call successors, (29) Word has length 148 [2023-03-31 23:34:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:01,854 INFO L225 Difference]: With dead ends: 7531 [2023-03-31 23:34:01,854 INFO L226 Difference]: Without dead ends: 5007 [2023-03-31 23:34:01,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:34:01,871 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 1915 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 3581 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 4282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 3581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:01,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2098 Valid, 492 Invalid, 4282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 3581 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-03-31 23:34:01,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5007 states. [2023-03-31 23:34:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5007 to 4943. [2023-03-31 23:34:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4943 states, 3348 states have (on average 1.503584229390681) internal successors, (5034), 3439 states have internal predecessors, (5034), 1120 states have call successors, (1120), 391 states have call predecessors, (1120), 474 states have return successors, (1374), 1162 states have call predecessors, (1374), 1112 states have call successors, (1374) [2023-03-31 23:34:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4943 states to 4943 states and 7528 transitions. [2023-03-31 23:34:02,266 INFO L78 Accepts]: Start accepts. Automaton has 4943 states and 7528 transitions. Word has length 148 [2023-03-31 23:34:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:02,266 INFO L495 AbstractCegarLoop]: Abstraction has 4943 states and 7528 transitions. [2023-03-31 23:34:02,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 7 states have call successors, (33), 5 states have call predecessors, (33), 4 states have return successors, (29), 8 states have call predecessors, (29), 6 states have call successors, (29) [2023-03-31 23:34:02,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4943 states and 7528 transitions. [2023-03-31 23:34:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-03-31 23:34:02,270 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:02,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:02,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 23:34:02,271 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:02,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:02,271 INFO L85 PathProgramCache]: Analyzing trace with hash 861677747, now seen corresponding path program 1 times [2023-03-31 23:34:02,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:02,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51141496] [2023-03-31 23:34:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:02,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 23:34:02,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:02,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51141496] [2023-03-31 23:34:02,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51141496] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:02,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:02,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-03-31 23:34:02,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980600261] [2023-03-31 23:34:02,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:02,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:34:02,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:02,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:34:02,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:34:02,682 INFO L87 Difference]: Start difference. First operand 4943 states and 7528 transitions. Second operand has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 4 states have call successors, (33), 2 states have call predecessors, (33), 5 states have return successors, (29), 6 states have call predecessors, (29), 4 states have call successors, (29) [2023-03-31 23:34:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:03,374 INFO L93 Difference]: Finished difference Result 10105 states and 15770 transitions. [2023-03-31 23:34:03,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 23:34:03,374 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 4 states have call successors, (33), 2 states have call predecessors, (33), 5 states have return successors, (29), 6 states have call predecessors, (29), 4 states have call successors, (29) Word has length 152 [2023-03-31 23:34:03,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:03,419 INFO L225 Difference]: With dead ends: 10105 [2023-03-31 23:34:03,419 INFO L226 Difference]: Without dead ends: 5695 [2023-03-31 23:34:03,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-03-31 23:34:03,447 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 230 mSDsluCounter, 4441 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 5117 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:03,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 5117 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:34:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5695 states. [2023-03-31 23:34:03,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 5695. [2023-03-31 23:34:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5695 states, 4044 states have (on average 1.5178041543026706) internal successors, (6138), 4155 states have internal predecessors, (6138), 1138 states have call successors, (1138), 409 states have call predecessors, (1138), 512 states have return successors, (1392), 1180 states have call predecessors, (1392), 1130 states have call successors, (1392) [2023-03-31 23:34:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5695 states to 5695 states and 8668 transitions. [2023-03-31 23:34:03,870 INFO L78 Accepts]: Start accepts. Automaton has 5695 states and 8668 transitions. Word has length 152 [2023-03-31 23:34:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:03,870 INFO L495 AbstractCegarLoop]: Abstraction has 5695 states and 8668 transitions. [2023-03-31 23:34:03,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 4 states have call successors, (33), 2 states have call predecessors, (33), 5 states have return successors, (29), 6 states have call predecessors, (29), 4 states have call successors, (29) [2023-03-31 23:34:03,870 INFO L276 IsEmpty]: Start isEmpty. Operand 5695 states and 8668 transitions. [2023-03-31 23:34:03,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-03-31 23:34:03,874 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:03,874 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:03,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 23:34:03,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:03,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:03,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1662095815, now seen corresponding path program 1 times [2023-03-31 23:34:03,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:03,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080579540] [2023-03-31 23:34:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:03,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 23:34:04,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:04,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080579540] [2023-03-31 23:34:04,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080579540] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:04,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:04,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:34:04,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071231655] [2023-03-31 23:34:04,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:04,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:34:04,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:04,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:34:04,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:34:04,474 INFO L87 Difference]: Start difference. First operand 5695 states and 8668 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 5 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (30), 5 states have call predecessors, (30), 4 states have call successors, (30) [2023-03-31 23:34:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:06,892 INFO L93 Difference]: Finished difference Result 10752 states and 16414 transitions. [2023-03-31 23:34:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:34:06,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 5 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (30), 5 states have call predecessors, (30), 4 states have call successors, (30) Word has length 154 [2023-03-31 23:34:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:06,926 INFO L225 Difference]: With dead ends: 10752 [2023-03-31 23:34:06,927 INFO L226 Difference]: Without dead ends: 5906 [2023-03-31 23:34:06,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:34:06,992 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1076 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 3429 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 3867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 3429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:06,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 571 Invalid, 3867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 3429 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-03-31 23:34:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5906 states. [2023-03-31 23:34:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5906 to 5785. [2023-03-31 23:34:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5785 states, 4104 states have (on average 1.51364522417154) internal successors, (6212), 4229 states have internal predecessors, (6212), 1140 states have call successors, (1140), 425 states have call predecessors, (1140), 540 states have return successors, (1430), 1180 states have call predecessors, (1430), 1132 states have call successors, (1430) [2023-03-31 23:34:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5785 states to 5785 states and 8782 transitions. [2023-03-31 23:34:07,377 INFO L78 Accepts]: Start accepts. Automaton has 5785 states and 8782 transitions. Word has length 154 [2023-03-31 23:34:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:07,378 INFO L495 AbstractCegarLoop]: Abstraction has 5785 states and 8782 transitions. [2023-03-31 23:34:07,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 5 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (30), 5 states have call predecessors, (30), 4 states have call successors, (30) [2023-03-31 23:34:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5785 states and 8782 transitions. [2023-03-31 23:34:07,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-03-31 23:34:07,382 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:07,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:07,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 23:34:07,382 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:07,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:07,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2137424185, now seen corresponding path program 1 times [2023-03-31 23:34:07,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:07,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033538598] [2023-03-31 23:34:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:07,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 23:34:07,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:07,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033538598] [2023-03-31 23:34:07,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033538598] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:07,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:07,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 23:34:07,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705841630] [2023-03-31 23:34:07,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:07,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:34:07,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:07,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:34:07,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:34:07,746 INFO L87 Difference]: Start difference. First operand 5785 states and 8782 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2023-03-31 23:34:08,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:08,439 INFO L93 Difference]: Finished difference Result 5838 states and 8864 transitions. [2023-03-31 23:34:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:08,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) Word has length 158 [2023-03-31 23:34:08,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:08,469 INFO L225 Difference]: With dead ends: 5838 [2023-03-31 23:34:08,470 INFO L226 Difference]: Without dead ends: 5821 [2023-03-31 23:34:08,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:34:08,476 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 694 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:08,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 1668 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 23:34:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5821 states. [2023-03-31 23:34:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5821 to 5791. [2023-03-31 23:34:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5791 states, 4110 states have (on average 1.5128953771289537) internal successors, (6218), 4235 states have internal predecessors, (6218), 1140 states have call successors, (1140), 425 states have call predecessors, (1140), 540 states have return successors, (1430), 1180 states have call predecessors, (1430), 1132 states have call successors, (1430) [2023-03-31 23:34:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5791 states to 5791 states and 8788 transitions. [2023-03-31 23:34:08,850 INFO L78 Accepts]: Start accepts. Automaton has 5791 states and 8788 transitions. Word has length 158 [2023-03-31 23:34:08,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:08,850 INFO L495 AbstractCegarLoop]: Abstraction has 5791 states and 8788 transitions. [2023-03-31 23:34:08,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2023-03-31 23:34:08,851 INFO L276 IsEmpty]: Start isEmpty. Operand 5791 states and 8788 transitions. [2023-03-31 23:34:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-03-31 23:34:08,854 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:08,854 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:08,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 23:34:08,854 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:08,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash -945229187, now seen corresponding path program 1 times [2023-03-31 23:34:08,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:08,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761118553] [2023-03-31 23:34:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:08,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 23:34:09,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:09,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761118553] [2023-03-31 23:34:09,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761118553] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:09,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:09,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-03-31 23:34:09,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298265843] [2023-03-31 23:34:09,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:09,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:34:09,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:09,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:34:09,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:34:09,287 INFO L87 Difference]: Start difference. First operand 5791 states and 8788 transitions. Second operand has 9 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 3 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (32), 5 states have call predecessors, (32), 2 states have call successors, (32) [2023-03-31 23:34:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:10,225 INFO L93 Difference]: Finished difference Result 6033 states and 9121 transitions. [2023-03-31 23:34:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:34:10,226 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 3 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (32), 5 states have call predecessors, (32), 2 states have call successors, (32) Word has length 163 [2023-03-31 23:34:10,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:10,249 INFO L225 Difference]: With dead ends: 6033 [2023-03-31 23:34:10,249 INFO L226 Difference]: Without dead ends: 6016 [2023-03-31 23:34:10,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-03-31 23:34:10,254 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 678 mSDsluCounter, 3696 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 4332 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:10,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 4332 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 23:34:10,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6016 states. [2023-03-31 23:34:10,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6016 to 5930. [2023-03-31 23:34:10,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5930 states, 4199 states have (on average 1.507501786139557) internal successors, (6330), 4324 states have internal predecessors, (6330), 1170 states have call successors, (1170), 445 states have call predecessors, (1170), 560 states have return successors, (1475), 1210 states have call predecessors, (1475), 1162 states have call successors, (1475) [2023-03-31 23:34:10,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5930 states to 5930 states and 8975 transitions. [2023-03-31 23:34:10,656 INFO L78 Accepts]: Start accepts. Automaton has 5930 states and 8975 transitions. Word has length 163 [2023-03-31 23:34:10,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:10,657 INFO L495 AbstractCegarLoop]: Abstraction has 5930 states and 8975 transitions. [2023-03-31 23:34:10,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 3 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (32), 5 states have call predecessors, (32), 2 states have call successors, (32) [2023-03-31 23:34:10,657 INFO L276 IsEmpty]: Start isEmpty. Operand 5930 states and 8975 transitions. [2023-03-31 23:34:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-03-31 23:34:10,664 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:10,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:10,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-31 23:34:10,664 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:10,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:10,665 INFO L85 PathProgramCache]: Analyzing trace with hash -985528768, now seen corresponding path program 1 times [2023-03-31 23:34:10,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:10,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460390850] [2023-03-31 23:34:10,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:10,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 23:34:11,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:11,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460390850] [2023-03-31 23:34:11,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460390850] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:11,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:11,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-03-31 23:34:11,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708683032] [2023-03-31 23:34:11,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:11,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 23:34:11,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:11,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 23:34:11,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:34:11,703 INFO L87 Difference]: Start difference. First operand 5930 states and 8975 transitions. Second operand has 10 states, 9 states have (on average 10.11111111111111) internal successors, (91), 10 states have internal predecessors, (91), 9 states have call successors, (39), 5 states have call predecessors, (39), 4 states have return successors, (35), 7 states have call predecessors, (35), 8 states have call successors, (35) [2023-03-31 23:34:15,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:15,361 INFO L93 Difference]: Finished difference Result 15077 states and 23091 transitions. [2023-03-31 23:34:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:34:15,362 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 10.11111111111111) internal successors, (91), 10 states have internal predecessors, (91), 9 states have call successors, (39), 5 states have call predecessors, (39), 4 states have return successors, (35), 7 states have call predecessors, (35), 8 states have call successors, (35) Word has length 178 [2023-03-31 23:34:15,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:15,421 INFO L225 Difference]: With dead ends: 15077 [2023-03-31 23:34:15,421 INFO L226 Difference]: Without dead ends: 9200 [2023-03-31 23:34:15,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:34:15,446 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 2335 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 4493 mSolverCounterSat, 987 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2454 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 5480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 987 IncrementalHoareTripleChecker+Valid, 4493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:15,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2454 Valid, 1289 Invalid, 5480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [987 Valid, 4493 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-31 23:34:15,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9200 states. [2023-03-31 23:34:16,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9200 to 8936. [2023-03-31 23:34:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8936 states, 6244 states have (on average 1.5076873798846893) internal successors, (9414), 6500 states have internal predecessors, (9414), 1867 states have call successors, (1867), 644 states have call predecessors, (1867), 824 states have return successors, (2383), 1891 states have call predecessors, (2383), 1859 states have call successors, (2383) [2023-03-31 23:34:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8936 states to 8936 states and 13664 transitions. [2023-03-31 23:34:16,165 INFO L78 Accepts]: Start accepts. Automaton has 8936 states and 13664 transitions. Word has length 178 [2023-03-31 23:34:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:16,165 INFO L495 AbstractCegarLoop]: Abstraction has 8936 states and 13664 transitions. [2023-03-31 23:34:16,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 10.11111111111111) internal successors, (91), 10 states have internal predecessors, (91), 9 states have call successors, (39), 5 states have call predecessors, (39), 4 states have return successors, (35), 7 states have call predecessors, (35), 8 states have call successors, (35) [2023-03-31 23:34:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 8936 states and 13664 transitions. [2023-03-31 23:34:16,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-03-31 23:34:16,169 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:16,170 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:16,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-03-31 23:34:16,170 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:16,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:16,170 INFO L85 PathProgramCache]: Analyzing trace with hash 787642874, now seen corresponding path program 1 times [2023-03-31 23:34:16,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:16,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291064662] [2023-03-31 23:34:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:16,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-03-31 23:34:16,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:16,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291064662] [2023-03-31 23:34:16,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291064662] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:16,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:16,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-03-31 23:34:16,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881466576] [2023-03-31 23:34:16,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:16,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 23:34:16,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:16,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 23:34:16,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:34:16,760 INFO L87 Difference]: Start difference. First operand 8936 states and 13664 transitions. Second operand has 10 states, 9 states have (on average 10.222222222222221) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (35), 5 states have call predecessors, (35), 2 states have call successors, (35) [2023-03-31 23:34:17,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:17,593 INFO L93 Difference]: Finished difference Result 18054 states and 27931 transitions. [2023-03-31 23:34:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 23:34:17,594 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 10.222222222222221) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (35), 5 states have call predecessors, (35), 2 states have call successors, (35) Word has length 179 [2023-03-31 23:34:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:17,650 INFO L225 Difference]: With dead ends: 18054 [2023-03-31 23:34:17,650 INFO L226 Difference]: Without dead ends: 10126 [2023-03-31 23:34:17,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:34:17,680 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 33 mSDsluCounter, 5166 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 5814 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:17,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 5814 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:34:17,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10126 states. [2023-03-31 23:34:18,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10126 to 9524. [2023-03-31 23:34:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 6594 states have (on average 1.5040946314831665) internal successors, (9918), 6934 states have internal predecessors, (9918), 2049 states have call successors, (2049), 644 states have call predecessors, (2049), 880 states have return successors, (2635), 2080 states have call predecessors, (2635), 2041 states have call successors, (2635) [2023-03-31 23:34:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 14602 transitions. [2023-03-31 23:34:18,499 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 14602 transitions. Word has length 179 [2023-03-31 23:34:18,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:18,500 INFO L495 AbstractCegarLoop]: Abstraction has 9524 states and 14602 transitions. [2023-03-31 23:34:18,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 10.222222222222221) internal successors, (92), 7 states have internal predecessors, (92), 2 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (35), 5 states have call predecessors, (35), 2 states have call successors, (35) [2023-03-31 23:34:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 14602 transitions. [2023-03-31 23:34:18,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-03-31 23:34:18,510 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:18,511 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:18,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-03-31 23:34:18,511 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:18,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash 656540370, now seen corresponding path program 1 times [2023-03-31 23:34:18,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:18,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285040629] [2023-03-31 23:34:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:18,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 23:34:19,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:19,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285040629] [2023-03-31 23:34:19,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285040629] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:34:19,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073135696] [2023-03-31 23:34:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:19,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:34:19,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:34:19,675 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) [2023-03-31 23:34:19,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:34:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:20,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 23 conjunts are in the unsatisfiable core [2023-03-31 23:34:20,274 INFO L285 TraceCheckSpWp]: Computing forward predicates...