/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_spec3_product01.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:35:08,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:35:08,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:35:08,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:35:08,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:35:08,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:35:08,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:35:08,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:35:08,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:35:08,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:35:08,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:35:08,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:35:08,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:35:08,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:35:08,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:35:08,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:35:08,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:35:08,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:35:08,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:35:08,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:35:08,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:35:08,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:35:08,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:35:08,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:35:08,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:35:08,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:35:08,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:35:08,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:35:08,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:35:08,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:35:08,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:35:08,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:35:08,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:35:08,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:35:08,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:35:08,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:35:08,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:35:08,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:35:08,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:35:08,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:35:08,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:35:08,440 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 23:35:08,462 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:35:08,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:35:08,463 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:35:08,463 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:35:08,464 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:35:08,464 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:35:08,464 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:35:08,464 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:35:08,464 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:35:08,464 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:35:08,465 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:35:08,465 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:35:08,465 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:35:08,465 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:35:08,466 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:35:08,466 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:35:08,466 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:35:08,466 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:35:08,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:35:08,466 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:35:08,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:35:08,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:35:08,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:35:08,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:35:08,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:35:08,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:35:08,467 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:35:08,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:35:08,467 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:35:08,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:35:08,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:35:08,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:35:08,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:35:08,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:35:08,468 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:35:08,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:35:08,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:35:08,469 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:35:08,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:35:08,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:35:08,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:35:08,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:35:08,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:35:08,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:35:08,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:35:08,682 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:35:08,683 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:35:08,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2023-03-31 23:35:09,756 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:35:09,978 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:35:09,978 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2023-03-31 23:35:10,001 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02aa961ff/927ca66e7e7147b8b1218fa873f87a6b/FLAGdfeffcbba [2023-03-31 23:35:10,013 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02aa961ff/927ca66e7e7147b8b1218fa873f87a6b [2023-03-31 23:35:10,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:35:10,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:35:10,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:35:10,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:35:10,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:35:10,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:35:10" (1/1) ... [2023-03-31 23:35:10,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3737eeba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:10, skipping insertion in model container [2023-03-31 23:35:10,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:35:10" (1/1) ... [2023-03-31 23:35:10,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:35:10,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:35:10,277 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_spec3_product01.cil.c[40412,40425] [2023-03-31 23:35:10,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:35:10,335 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:35:10,381 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_spec3_product01.cil.c[40412,40425] [2023-03-31 23:35:10,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:35:10,434 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:35:10,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:10 WrapperNode [2023-03-31 23:35:10,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:35:10,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:35:10,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:35:10,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:35:10,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:10" (1/1) ... [2023-03-31 23:35:10,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:10" (1/1) ... [2023-03-31 23:35:10,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:10" (1/1) ... [2023-03-31 23:35:10,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:10" (1/1) ... [2023-03-31 23:35:10,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:10" (1/1) ... [2023-03-31 23:35:10,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:10" (1/1) ... [2023-03-31 23:35:10,612 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:10" (1/1) ... [2023-03-31 23:35:10,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:10" (1/1) ... [2023-03-31 23:35:10,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:35:10,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:35:10,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:35:10,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:35:10,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:10" (1/1) ... [2023-03-31 23:35:10,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:35:10,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:10,692 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 23:35:10,763 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 23:35:10,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:35:10,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:35:10,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-03-31 23:35:10,778 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:35:10,779 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-03-31 23:35:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-03-31 23:35:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-03-31 23:35:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-03-31 23:35:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-03-31 23:35:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-03-31 23:35:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-03-31 23:35:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-03-31 23:35:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-03-31 23:35:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-03-31 23:35:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-03-31 23:35:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-03-31 23:35:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-03-31 23:35:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-03-31 23:35:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-03-31 23:35:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-03-31 23:35:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:35:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-03-31 23:35:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-03-31 23:35:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-03-31 23:35:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-03-31 23:35:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-03-31 23:35:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-03-31 23:35:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-03-31 23:35:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-03-31 23:35:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-03-31 23:35:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-03-31 23:35:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-03-31 23:35:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-03-31 23:35:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-03-31 23:35:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2023-03-31 23:35:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2023-03-31 23:35:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-03-31 23:35:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-03-31 23:35:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-03-31 23:35:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-03-31 23:35:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-03-31 23:35:10,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-03-31 23:35:10,783 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-03-31 23:35:10,784 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-03-31 23:35:10,784 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-03-31 23:35:10,784 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-03-31 23:35:10,784 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-03-31 23:35:10,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-03-31 23:35:10,785 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-03-31 23:35:10,785 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-03-31 23:35:10,785 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-03-31 23:35:10,785 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-03-31 23:35:10,785 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-03-31 23:35:10,785 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-03-31 23:35:10,786 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-03-31 23:35:10,786 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-03-31 23:35:10,786 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-03-31 23:35:10,786 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-03-31 23:35:10,786 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-03-31 23:35:10,787 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-03-31 23:35:10,787 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-03-31 23:35:10,787 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-03-31 23:35:10,787 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-03-31 23:35:10,787 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-03-31 23:35:10,787 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-03-31 23:35:10,787 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-03-31 23:35:10,787 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-03-31 23:35:10,788 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-03-31 23:35:10,788 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-03-31 23:35:10,788 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-03-31 23:35:10,788 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-03-31 23:35:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:35:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:35:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:35:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:35:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:35:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 23:35:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-03-31 23:35:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-03-31 23:35:10,789 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-03-31 23:35:10,789 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-03-31 23:35:10,789 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-03-31 23:35:10,789 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-03-31 23:35:10,789 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-03-31 23:35:10,789 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-03-31 23:35:10,789 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-03-31 23:35:10,790 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-03-31 23:35:10,790 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-03-31 23:35:10,790 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-03-31 23:35:10,790 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-03-31 23:35:10,790 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-03-31 23:35:10,790 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-03-31 23:35:10,790 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-03-31 23:35:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-03-31 23:35:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-03-31 23:35:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-03-31 23:35:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-03-31 23:35:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-03-31 23:35:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-03-31 23:35:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-03-31 23:35:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-03-31 23:35:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-03-31 23:35:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-03-31 23:35:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-03-31 23:35:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:35:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-03-31 23:35:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-03-31 23:35:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-03-31 23:35:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-03-31 23:35:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-03-31 23:35:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-03-31 23:35:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-03-31 23:35:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-03-31 23:35:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-03-31 23:35:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-03-31 23:35:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-03-31 23:35:10,793 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-03-31 23:35:10,793 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-03-31 23:35:10,793 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-03-31 23:35:10,793 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-03-31 23:35:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-03-31 23:35:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2023-03-31 23:35:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2023-03-31 23:35:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 23:35:10,799 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 23:35:10,799 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-03-31 23:35:10,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 23:35:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 23:35:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:35:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 23:35:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-03-31 23:35:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:35:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-03-31 23:35:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-03-31 23:35:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-03-31 23:35:10,802 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-03-31 23:35:10,802 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-03-31 23:35:10,802 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-03-31 23:35:10,802 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-03-31 23:35:10,802 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-03-31 23:35:10,802 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-03-31 23:35:10,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:35:10,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:35:10,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:35:11,032 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:35:11,035 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:35:12,079 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:35:12,763 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:35:12,763 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-03-31 23:35:12,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:35:12 BoogieIcfgContainer [2023-03-31 23:35:12,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:35:12,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:35:12,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:35:12,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:35:12,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:35:10" (1/3) ... [2023-03-31 23:35:12,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18efa126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:35:12, skipping insertion in model container [2023-03-31 23:35:12,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:10" (2/3) ... [2023-03-31 23:35:12,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18efa126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:35:12, skipping insertion in model container [2023-03-31 23:35:12,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:35:12" (3/3) ... [2023-03-31 23:35:12,776 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product01.cil.c [2023-03-31 23:35:12,792 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:35:12,793 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:35:12,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:35:12,857 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;@76caa05b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:35:12,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:35:12,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 554 states, 326 states have (on average 1.5030674846625767) internal successors, (490), 349 states have internal predecessors, (490), 170 states have call successors, (170), 44 states have call predecessors, (170), 44 states have return successors, (170), 164 states have call predecessors, (170), 170 states have call successors, (170) [2023-03-31 23:35:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 23:35:12,885 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:12,885 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:35:12,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:12,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash -337399849, now seen corresponding path program 1 times [2023-03-31 23:35:12,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:12,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760481472] [2023-03-31 23:35:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:12,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:35:13,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:13,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760481472] [2023-03-31 23:35:13,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760481472] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:13,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:35:13,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:35:13,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866331288] [2023-03-31 23:35:13,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:13,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:35:13,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:13,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:35:13,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:35:13,844 INFO L87 Difference]: Start difference. First operand has 554 states, 326 states have (on average 1.5030674846625767) internal successors, (490), 349 states have internal predecessors, (490), 170 states have call successors, (170), 44 states have call predecessors, (170), 44 states have return successors, (170), 164 states have call predecessors, (170), 170 states have call successors, (170) Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-03-31 23:35:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:15,480 INFO L93 Difference]: Finished difference Result 1538 states and 2400 transitions. [2023-03-31 23:35:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:35:15,482 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 98 [2023-03-31 23:35:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:15,512 INFO L225 Difference]: With dead ends: 1538 [2023-03-31 23:35:15,512 INFO L226 Difference]: Without dead ends: 1106 [2023-03-31 23:35:15,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-03-31 23:35:15,522 INFO L413 NwaCegarLoop]: 1053 mSDtfsCounter, 1215 mSDsluCounter, 2672 mSDsCounter, 0 mSdLazyCounter, 2563 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 3725 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:15,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1234 Valid, 3725 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2563 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 23:35:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2023-03-31 23:35:15,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1096. [2023-03-31 23:35:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 709 states have (on average 1.5091678420310297) internal successors, (1070), 753 states have internal predecessors, (1070), 293 states have call successors, (293), 99 states have call predecessors, (293), 93 states have return successors, (302), 279 states have call predecessors, (302), 285 states have call successors, (302) [2023-03-31 23:35:15,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1665 transitions. [2023-03-31 23:35:15,657 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1665 transitions. Word has length 98 [2023-03-31 23:35:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:15,658 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1665 transitions. [2023-03-31 23:35:15,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-03-31 23:35:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1665 transitions. [2023-03-31 23:35:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-03-31 23:35:15,661 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:15,661 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:35:15,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:35:15,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:15,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:15,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1533976528, now seen corresponding path program 1 times [2023-03-31 23:35:15,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:15,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693047215] [2023-03-31 23:35:15,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:15,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:35:16,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:16,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693047215] [2023-03-31 23:35:16,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693047215] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:16,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:35:16,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:35:16,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45127792] [2023-03-31 23:35:16,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:16,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:35:16,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:16,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:35:16,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:35:16,030 INFO L87 Difference]: Start difference. First operand 1096 states and 1665 transitions. Second operand has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2023-03-31 23:35:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:16,198 INFO L93 Difference]: Finished difference Result 1917 states and 2942 transitions. [2023-03-31 23:35:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:35:16,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 103 [2023-03-31 23:35:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:16,208 INFO L225 Difference]: With dead ends: 1917 [2023-03-31 23:35:16,209 INFO L226 Difference]: Without dead ends: 1114 [2023-03-31 23:35:16,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:35:16,217 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 33 mSDsluCounter, 3625 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 4238 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:16,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 4238 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:35:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2023-03-31 23:35:16,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2023-03-31 23:35:16,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 720 states have (on average 1.5013888888888889) internal successors, (1081), 764 states have internal predecessors, (1081), 295 states have call successors, (295), 99 states have call predecessors, (295), 98 states have return successors, (310), 286 states have call predecessors, (310), 287 states have call successors, (310) [2023-03-31 23:35:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1686 transitions. [2023-03-31 23:35:16,280 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1686 transitions. Word has length 103 [2023-03-31 23:35:16,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:16,282 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1686 transitions. [2023-03-31 23:35:16,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2023-03-31 23:35:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1686 transitions. [2023-03-31 23:35:16,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-03-31 23:35:16,285 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:16,285 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:35:16,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:35:16,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:16,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:16,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1985895718, now seen corresponding path program 1 times [2023-03-31 23:35:16,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:16,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947741816] [2023-03-31 23:35:16,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:16,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 23:35:16,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:16,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947741816] [2023-03-31 23:35:16,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947741816] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:16,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267707571] [2023-03-31 23:35:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:16,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:16,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:16,735 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 23:35:16,736 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 23:35:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:17,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 23:35:17,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:35:17,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:35:17,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267707571] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:17,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:35:17,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-31 23:35:17,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416413222] [2023-03-31 23:35:17,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:17,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:35:17,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:17,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:35:17,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:35:17,335 INFO L87 Difference]: Start difference. First operand 1114 states and 1686 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-03-31 23:35:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:17,811 INFO L93 Difference]: Finished difference Result 1938 states and 2954 transitions. [2023-03-31 23:35:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:35:17,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 107 [2023-03-31 23:35:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:17,817 INFO L225 Difference]: With dead ends: 1938 [2023-03-31 23:35:17,817 INFO L226 Difference]: Without dead ends: 1122 [2023-03-31 23:35:17,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-03-31 23:35:17,821 INFO L413 NwaCegarLoop]: 688 mSDtfsCounter, 436 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 2075 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:17,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 2075 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 23:35:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2023-03-31 23:35:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1118. [2023-03-31 23:35:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 722 states have (on average 1.5) internal successors, (1083), 767 states have internal predecessors, (1083), 295 states have call successors, (295), 100 states have call predecessors, (295), 100 states have return successors, (311), 286 states have call predecessors, (311), 287 states have call successors, (311) [2023-03-31 23:35:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1689 transitions. [2023-03-31 23:35:17,863 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1689 transitions. Word has length 107 [2023-03-31 23:35:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:17,864 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1689 transitions. [2023-03-31 23:35:17,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-03-31 23:35:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1689 transitions. [2023-03-31 23:35:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-03-31 23:35:17,865 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:17,865 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:35:17,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:35:18,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:18,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:18,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:18,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1678297587, now seen corresponding path program 1 times [2023-03-31 23:35:18,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:18,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551114680] [2023-03-31 23:35:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:18,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 23:35:18,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:18,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551114680] [2023-03-31 23:35:18,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551114680] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:18,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230920983] [2023-03-31 23:35:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:18,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:18,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:18,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:35:18,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:35:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:18,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:35:18,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:35:18,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:35:18,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230920983] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:18,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:35:18,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-03-31 23:35:18,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495056272] [2023-03-31 23:35:18,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:18,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:35:18,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:18,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:35:18,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:35:18,896 INFO L87 Difference]: Start difference. First operand 1118 states and 1689 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-03-31 23:35:19,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:19,058 INFO L93 Difference]: Finished difference Result 2068 states and 3193 transitions. [2023-03-31 23:35:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 23:35:19,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 108 [2023-03-31 23:35:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:19,066 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 23:35:19,066 INFO L226 Difference]: Without dead ends: 1118 [2023-03-31 23:35:19,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:35:19,071 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 263 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:19,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1703 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:35:19,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2023-03-31 23:35:19,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1118. [2023-03-31 23:35:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 722 states have (on average 1.4750692520775623) internal successors, (1065), 767 states have internal predecessors, (1065), 295 states have call successors, (295), 100 states have call predecessors, (295), 100 states have return successors, (311), 286 states have call predecessors, (311), 287 states have call successors, (311) [2023-03-31 23:35:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1671 transitions. [2023-03-31 23:35:19,114 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1671 transitions. Word has length 108 [2023-03-31 23:35:19,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:19,115 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1671 transitions. [2023-03-31 23:35:19,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-03-31 23:35:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1671 transitions. [2023-03-31 23:35:19,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-03-31 23:35:19,117 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:19,117 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:35:19,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:35:19,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-31 23:35:19,327 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:19,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:19,327 INFO L85 PathProgramCache]: Analyzing trace with hash -901821569, now seen corresponding path program 1 times [2023-03-31 23:35:19,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:19,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720957842] [2023-03-31 23:35:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:19,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 23:35:19,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:19,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720957842] [2023-03-31 23:35:19,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720957842] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:19,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273040250] [2023-03-31 23:35:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:19,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:19,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:19,702 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:35:19,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:35:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:20,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 19 conjunts are in the unsatisfiable core [2023-03-31 23:35:20,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:35:20,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:35:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 23:35:20,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273040250] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:20,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:35:20,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 17 [2023-03-31 23:35:20,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876628092] [2023-03-31 23:35:20,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:20,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:35:20,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:35:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-03-31 23:35:20,572 INFO L87 Difference]: Start difference. First operand 1118 states and 1671 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-03-31 23:35:23,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:23,010 INFO L93 Difference]: Finished difference Result 2827 states and 4376 transitions. [2023-03-31 23:35:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-31 23:35:23,010 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 110 [2023-03-31 23:35:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:23,020 INFO L225 Difference]: With dead ends: 2827 [2023-03-31 23:35:23,021 INFO L226 Difference]: Without dead ends: 2092 [2023-03-31 23:35:23,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:35:23,025 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 2948 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 1336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3038 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 3858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1336 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:23,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3038 Valid, 2140 Invalid, 3858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1336 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-03-31 23:35:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2023-03-31 23:35:23,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 2031. [2023-03-31 23:35:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1341 states have (on average 1.4817300521998509) internal successors, (1987), 1418 states have internal predecessors, (1987), 508 states have call successors, (508), 175 states have call predecessors, (508), 181 states have return successors, (593), 497 states have call predecessors, (593), 498 states have call successors, (593) [2023-03-31 23:35:23,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 3088 transitions. [2023-03-31 23:35:23,119 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 3088 transitions. Word has length 110 [2023-03-31 23:35:23,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:23,120 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 3088 transitions. [2023-03-31 23:35:23,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-03-31 23:35:23,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 3088 transitions. [2023-03-31 23:35:23,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-03-31 23:35:23,122 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:23,122 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:35:23,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-31 23:35:23,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:23,353 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:23,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:23,353 INFO L85 PathProgramCache]: Analyzing trace with hash -150475553, now seen corresponding path program 1 times [2023-03-31 23:35:23,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:23,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838877867] [2023-03-31 23:35:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:23,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 23:35:23,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:23,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838877867] [2023-03-31 23:35:23,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838877867] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:23,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869032378] [2023-03-31 23:35:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:23,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:23,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:23,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:35:23,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:35:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:24,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 2632 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 23:35:24,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:35:24,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:35:24,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869032378] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:24,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:35:24,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-03-31 23:35:24,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946268938] [2023-03-31 23:35:24,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:24,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:35:24,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:35:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:35:24,316 INFO L87 Difference]: Start difference. First operand 2031 states and 3088 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-03-31 23:35:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:24,525 INFO L93 Difference]: Finished difference Result 5822 states and 9145 transitions. [2023-03-31 23:35:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:35:24,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 111 [2023-03-31 23:35:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:24,549 INFO L225 Difference]: With dead ends: 5822 [2023-03-31 23:35:24,549 INFO L226 Difference]: Without dead ends: 3822 [2023-03-31 23:35:24,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:35:24,559 INFO L413 NwaCegarLoop]: 848 mSDtfsCounter, 481 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:24,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1430 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:35:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2023-03-31 23:35:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3699. [2023-03-31 23:35:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 2463 states have (on average 1.4900527811611854) internal successors, (3670), 2620 states have internal predecessors, (3670), 905 states have call successors, (905), 302 states have call predecessors, (905), 330 states have return successors, (1115), 896 states have call predecessors, (1115), 895 states have call successors, (1115) [2023-03-31 23:35:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 5690 transitions. [2023-03-31 23:35:24,747 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 5690 transitions. Word has length 111 [2023-03-31 23:35:24,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:24,748 INFO L495 AbstractCegarLoop]: Abstraction has 3699 states and 5690 transitions. [2023-03-31 23:35:24,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-03-31 23:35:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 5690 transitions. [2023-03-31 23:35:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-03-31 23:35:24,753 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:24,753 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:35:24,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:35:24,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:24,961 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:24,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:24,962 INFO L85 PathProgramCache]: Analyzing trace with hash 553132799, now seen corresponding path program 1 times [2023-03-31 23:35:24,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:24,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895383998] [2023-03-31 23:35:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:24,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 23:35:25,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:25,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895383998] [2023-03-31 23:35:25,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895383998] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:25,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722985821] [2023-03-31 23:35:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:25,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:25,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:25,300 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:35:25,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:35:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:25,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 23:35:25,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:35:25,773 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:35:25,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722985821] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:25,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:35:25,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-03-31 23:35:25,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215812902] [2023-03-31 23:35:25,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:25,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:35:25,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:25,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:35:25,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:35:25,775 INFO L87 Difference]: Start difference. First operand 3699 states and 5690 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-03-31 23:35:26,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:26,031 INFO L93 Difference]: Finished difference Result 8315 states and 13014 transitions. [2023-03-31 23:35:26,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:35:26,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 110 [2023-03-31 23:35:26,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:26,063 INFO L225 Difference]: With dead ends: 8315 [2023-03-31 23:35:26,063 INFO L226 Difference]: Without dead ends: 4647 [2023-03-31 23:35:26,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:35:26,084 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 561 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:26,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1123 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:35:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4647 states. [2023-03-31 23:35:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4647 to 4535. [2023-03-31 23:35:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4535 states, 3042 states have (on average 1.4927679158448388) internal successors, (4541), 3229 states have internal predecessors, (4541), 1090 states have call successors, (1090), 365 states have call predecessors, (1090), 402 states have return successors, (1364), 1084 states have call predecessors, (1364), 1080 states have call successors, (1364) [2023-03-31 23:35:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4535 states to 4535 states and 6995 transitions. [2023-03-31 23:35:26,428 INFO L78 Accepts]: Start accepts. Automaton has 4535 states and 6995 transitions. Word has length 110 [2023-03-31 23:35:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:26,430 INFO L495 AbstractCegarLoop]: Abstraction has 4535 states and 6995 transitions. [2023-03-31 23:35:26,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-03-31 23:35:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4535 states and 6995 transitions. [2023-03-31 23:35:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-03-31 23:35:26,432 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:26,432 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:35:26,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-31 23:35:26,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:26,641 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:26,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:26,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1001393255, now seen corresponding path program 1 times [2023-03-31 23:35:26,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:26,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774860731] [2023-03-31 23:35:26,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:26,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 23:35:26,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:26,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774860731] [2023-03-31 23:35:26,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774860731] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:26,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609681548] [2023-03-31 23:35:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:26,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:26,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:26,973 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:35:26,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:35:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:27,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 23:35:27,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:35:27,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:35:27,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609681548] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:27,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:35:27,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-03-31 23:35:27,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817173114] [2023-03-31 23:35:27,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:27,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:35:27,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:27,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:35:27,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:35:27,429 INFO L87 Difference]: Start difference. First operand 4535 states and 6995 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-03-31 23:35:27,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:27,781 INFO L93 Difference]: Finished difference Result 9995 states and 15733 transitions. [2023-03-31 23:35:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:35:27,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 113 [2023-03-31 23:35:27,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:27,810 INFO L225 Difference]: With dead ends: 9995 [2023-03-31 23:35:27,810 INFO L226 Difference]: Without dead ends: 5491 [2023-03-31 23:35:27,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:35:27,830 INFO L413 NwaCegarLoop]: 832 mSDtfsCounter, 556 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:27,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 1323 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:35:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5491 states. [2023-03-31 23:35:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5491 to 5288. [2023-03-31 23:35:28,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 3567 states have (on average 1.495654611718531) internal successors, (5335), 3786 states have internal predecessors, (5335), 1260 states have call successors, (1260), 416 states have call predecessors, (1260), 460 states have return successors, (1557), 1253 states have call predecessors, (1557), 1250 states have call successors, (1557) [2023-03-31 23:35:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 8152 transitions. [2023-03-31 23:35:28,079 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 8152 transitions. Word has length 113 [2023-03-31 23:35:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:28,081 INFO L495 AbstractCegarLoop]: Abstraction has 5288 states and 8152 transitions. [2023-03-31 23:35:28,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-03-31 23:35:28,082 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 8152 transitions. [2023-03-31 23:35:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-03-31 23:35:28,083 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:28,083 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:35:28,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 23:35:28,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:28,293 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:28,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:28,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1537564089, now seen corresponding path program 1 times [2023-03-31 23:35:28,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:28,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156777354] [2023-03-31 23:35:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:28,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 23:35:28,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:28,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156777354] [2023-03-31 23:35:28,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156777354] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:28,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879267582] [2023-03-31 23:35:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:28,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:28,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:28,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:35:28,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 23:35:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:29,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 2648 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 23:35:29,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:35:29,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:35:29,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879267582] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:29,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:35:29,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-31 23:35:29,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615261935] [2023-03-31 23:35:29,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:29,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:35:29,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:29,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:35:29,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:35:29,193 INFO L87 Difference]: Start difference. First operand 5288 states and 8152 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-03-31 23:35:29,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:29,776 INFO L93 Difference]: Finished difference Result 9902 states and 15317 transitions. [2023-03-31 23:35:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:35:29,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 114 [2023-03-31 23:35:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:29,814 INFO L225 Difference]: With dead ends: 9902 [2023-03-31 23:35:29,815 INFO L226 Difference]: Without dead ends: 5302 [2023-03-31 23:35:29,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:35:29,838 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 413 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 2568 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:29,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 2568 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:35:29,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2023-03-31 23:35:30,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 5288. [2023-03-31 23:35:30,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 3567 states have (on average 1.495654611718531) internal successors, (5335), 3786 states have internal predecessors, (5335), 1260 states have call successors, (1260), 416 states have call predecessors, (1260), 460 states have return successors, (1553), 1253 states have call predecessors, (1553), 1250 states have call successors, (1553) [2023-03-31 23:35:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 8148 transitions. [2023-03-31 23:35:30,135 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 8148 transitions. Word has length 114 [2023-03-31 23:35:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:30,135 INFO L495 AbstractCegarLoop]: Abstraction has 5288 states and 8148 transitions. [2023-03-31 23:35:30,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-03-31 23:35:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 8148 transitions. [2023-03-31 23:35:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-03-31 23:35:30,137 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:30,138 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:35:30,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-03-31 23:35:30,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:30,346 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:30,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1237188102, now seen corresponding path program 1 times [2023-03-31 23:35:30,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:30,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247405058] [2023-03-31 23:35:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:30,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 23:35:30,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:30,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247405058] [2023-03-31 23:35:30,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247405058] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:30,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510332999] [2023-03-31 23:35:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:30,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:30,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:30,753 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:35:30,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 23:35:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:31,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 23:35:31,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:35:31,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:35:31,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510332999] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:31,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:35:31,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-31 23:35:31,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773539549] [2023-03-31 23:35:31,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:31,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:35:31,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:31,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:35:31,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:35:31,226 INFO L87 Difference]: Start difference. First operand 5288 states and 8148 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2023-03-31 23:35:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:31,637 INFO L93 Difference]: Finished difference Result 10180 states and 15955 transitions. [2023-03-31 23:35:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:35:31,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) Word has length 134 [2023-03-31 23:35:31,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:31,666 INFO L225 Difference]: With dead ends: 10180 [2023-03-31 23:35:31,666 INFO L226 Difference]: Without dead ends: 5414 [2023-03-31 23:35:31,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 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 23:35:31,687 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 2 mSDsluCounter, 1784 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:31,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2387 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:35:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5414 states. [2023-03-31 23:35:31,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5414 to 5356. [2023-03-31 23:35:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5356 states, 3613 states have (on average 1.4893440354276224) internal successors, (5381), 3842 states have internal predecessors, (5381), 1260 states have call successors, (1260), 416 states have call predecessors, (1260), 482 states have return successors, (1641), 1265 states have call predecessors, (1641), 1250 states have call successors, (1641) [2023-03-31 23:35:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5356 states to 5356 states and 8282 transitions. [2023-03-31 23:35:31,940 INFO L78 Accepts]: Start accepts. Automaton has 5356 states and 8282 transitions. Word has length 134 [2023-03-31 23:35:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:31,941 INFO L495 AbstractCegarLoop]: Abstraction has 5356 states and 8282 transitions. [2023-03-31 23:35:31,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (27), 3 states have call predecessors, (27), 2 states have call successors, (27) [2023-03-31 23:35:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 5356 states and 8282 transitions. [2023-03-31 23:35:31,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-03-31 23:35:31,946 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:31,946 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-03-31 23:35:31,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 23:35:32,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 23:35:32,155 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:32,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:32,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2011337008, now seen corresponding path program 1 times [2023-03-31 23:35:32,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:32,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598331404] [2023-03-31 23:35:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:32,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-31 23:35:32,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:32,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598331404] [2023-03-31 23:35:32,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598331404] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:32,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266245268] [2023-03-31 23:35:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:32,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:32,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:32,541 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:35:32,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 23:35:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:33,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 2782 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:35:33,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-03-31 23:35:33,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:35:33,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266245268] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:33,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:35:33,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-03-31 23:35:33,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44149453] [2023-03-31 23:35:33,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:33,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:35:33,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:33,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:35:33,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:35:33,076 INFO L87 Difference]: Start difference. First operand 5356 states and 8282 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 4 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2023-03-31 23:35:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:33,423 INFO L93 Difference]: Finished difference Result 11068 states and 17433 transitions. [2023-03-31 23:35:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 23:35:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 4 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 165 [2023-03-31 23:35:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:33,449 INFO L225 Difference]: With dead ends: 11068 [2023-03-31 23:35:33,450 INFO L226 Difference]: Without dead ends: 5356 [2023-03-31 23:35:33,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:35:33,471 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 194 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:33,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1696 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:35:33,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2023-03-31 23:35:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 5356. [2023-03-31 23:35:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5356 states, 3613 states have (on average 1.460559092167174) internal successors, (5277), 3842 states have internal predecessors, (5277), 1260 states have call successors, (1260), 416 states have call predecessors, (1260), 482 states have return successors, (1641), 1265 states have call predecessors, (1641), 1250 states have call successors, (1641) [2023-03-31 23:35:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5356 states to 5356 states and 8178 transitions. [2023-03-31 23:35:33,703 INFO L78 Accepts]: Start accepts. Automaton has 5356 states and 8178 transitions. Word has length 165 [2023-03-31 23:35:33,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:33,705 INFO L495 AbstractCegarLoop]: Abstraction has 5356 states and 8178 transitions. [2023-03-31 23:35:33,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 4 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2023-03-31 23:35:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 5356 states and 8178 transitions. [2023-03-31 23:35:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-03-31 23:35:33,711 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:33,711 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-31 23:35:33,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-03-31 23:35:33,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:33,936 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:33,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:33,936 INFO L85 PathProgramCache]: Analyzing trace with hash 552574271, now seen corresponding path program 1 times [2023-03-31 23:35:33,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:33,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732652599] [2023-03-31 23:35:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:33,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-03-31 23:35:34,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:34,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732652599] [2023-03-31 23:35:34,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732652599] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:34,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242641655] [2023-03-31 23:35:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:34,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:34,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:34,284 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:35:34,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 23:35:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:34,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:35:34,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:35:34,823 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:35:34,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242641655] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:34,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:35:34,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-03-31 23:35:34,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071558414] [2023-03-31 23:35:34,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:34,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:35:34,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:34,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:35:34,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:35:34,825 INFO L87 Difference]: Start difference. First operand 5356 states and 8178 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2023-03-31 23:35:35,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:35,123 INFO L93 Difference]: Finished difference Result 10804 states and 16770 transitions. [2023-03-31 23:35:35,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:35:35,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 167 [2023-03-31 23:35:35,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:35,149 INFO L225 Difference]: With dead ends: 10804 [2023-03-31 23:35:35,149 INFO L226 Difference]: Without dead ends: 5479 [2023-03-31 23:35:35,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 168 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 23:35:35,168 INFO L413 NwaCegarLoop]: 894 mSDtfsCounter, 471 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:35,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1470 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:35:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5479 states. [2023-03-31 23:35:35,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5479 to 5356. [2023-03-31 23:35:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5356 states, 3613 states have (on average 1.459175200664268) internal successors, (5272), 3842 states have internal predecessors, (5272), 1260 states have call successors, (1260), 416 states have call predecessors, (1260), 482 states have return successors, (1641), 1265 states have call predecessors, (1641), 1250 states have call successors, (1641) [2023-03-31 23:35:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5356 states to 5356 states and 8173 transitions. [2023-03-31 23:35:35,472 INFO L78 Accepts]: Start accepts. Automaton has 5356 states and 8173 transitions. Word has length 167 [2023-03-31 23:35:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:35,472 INFO L495 AbstractCegarLoop]: Abstraction has 5356 states and 8173 transitions. [2023-03-31 23:35:35,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2023-03-31 23:35:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5356 states and 8173 transitions. [2023-03-31 23:35:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-03-31 23:35:35,477 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:35,478 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:35:35,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-03-31 23:35:35,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-31 23:35:35,686 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:35,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1488522401, now seen corresponding path program 1 times [2023-03-31 23:35:35,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:35,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442143721] [2023-03-31 23:35:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:35,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-03-31 23:35:36,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:36,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442143721] [2023-03-31 23:35:36,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442143721] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:36,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478892878] [2023-03-31 23:35:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:36,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:36,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:36,015 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:35:36,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 23:35:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:36,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 2977 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 23:35:36,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:35:36,809 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:35:36,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478892878] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:36,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:35:36,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2023-03-31 23:35:36,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837176086] [2023-03-31 23:35:36,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:36,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:35:36,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:36,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:35:36,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2023-03-31 23:35:36,811 INFO L87 Difference]: Start difference. First operand 5356 states and 8173 transitions. Second operand has 9 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 5 states have call successors, (39), 4 states have call predecessors, (39), 6 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) [2023-03-31 23:35:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:40,903 INFO L93 Difference]: Finished difference Result 14856 states and 23065 transitions. [2023-03-31 23:35:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-31 23:35:40,903 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 5 states have call successors, (39), 4 states have call predecessors, (39), 6 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) Word has length 166 [2023-03-31 23:35:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:40,949 INFO L225 Difference]: With dead ends: 14856 [2023-03-31 23:35:40,949 INFO L226 Difference]: Without dead ends: 9531 [2023-03-31 23:35:40,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2023-03-31 23:35:40,971 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 1807 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 6992 mSolverCounterSat, 821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1896 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 7813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 6992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:40,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1896 Valid, 1171 Invalid, 7813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 6992 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-03-31 23:35:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9531 states. [2023-03-31 23:35:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9531 to 9082. [2023-03-31 23:35:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9082 states, 6137 states have (on average 1.4647221769594265) internal successors, (8989), 6528 states have internal predecessors, (8989), 2134 states have call successors, (2134), 699 states have call predecessors, (2134), 810 states have return successors, (2881), 2142 states have call predecessors, (2881), 2120 states have call successors, (2881) [2023-03-31 23:35:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9082 states to 9082 states and 14004 transitions. [2023-03-31 23:35:41,477 INFO L78 Accepts]: Start accepts. Automaton has 9082 states and 14004 transitions. Word has length 166 [2023-03-31 23:35:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:41,478 INFO L495 AbstractCegarLoop]: Abstraction has 9082 states and 14004 transitions. [2023-03-31 23:35:41,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 5 states have call successors, (39), 4 states have call predecessors, (39), 6 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) [2023-03-31 23:35:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 9082 states and 14004 transitions. [2023-03-31 23:35:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-03-31 23:35:41,485 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:41,485 INFO L195 NwaCegarLoop]: trace histogram [5, 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 23:35:41,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-31 23:35:41,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-31 23:35:41,694 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:41,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1553388820, now seen corresponding path program 1 times [2023-03-31 23:35:41,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:41,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72166253] [2023-03-31 23:35:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:41,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-31 23:35:41,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:41,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72166253] [2023-03-31 23:35:41,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72166253] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684919591] [2023-03-31 23:35:41,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:41,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:41,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:42,003 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:35:42,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-31 23:35:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:42,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 2786 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 23:35:42,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 23:35:42,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:35:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-03-31 23:35:43,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684919591] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:35:43,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [59653052] [2023-03-31 23:35:43,247 INFO L159 IcfgInterpreter]: Started Sifa with 150 locations of interest [2023-03-31 23:35:43,247 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:35:43,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:35:43,253 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:35:43,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:35:45,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 166 for LOIs [2023-03-31 23:35:45,425 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 216 for LOIs [2023-03-31 23:35:47,573 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 216 for LOIs [2023-03-31 23:35:47,918 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 216 for LOIs [2023-03-31 23:35:52,077 INFO L197 IcfgInterpreter]: Interpreting procedure threeTS with input of size 182 for LOIs [2023-03-31 23:35:52,398 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 182 for LOIs [2023-03-31 23:35:53,298 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 57 for LOIs [2023-03-31 23:35:53,946 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor with input of size 48 for LOIs [2023-03-31 23:35:54,068 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 52 for LOIs [2023-03-31 23:35:54,110 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 50 for LOIs [2023-03-31 23:35:54,116 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification3_spec__1 with input of size 49 for LOIs [2023-03-31 23:35:54,249 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 47 for LOIs [2023-03-31 23:35:54,255 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 54 for LOIs [2023-03-31 23:35:54,282 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 50 for LOIs [2023-03-31 23:35:54,290 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 187 for LOIs [2023-03-31 23:35:55,518 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 191 for LOIs [2023-03-31 23:35:56,409 INFO L197 IcfgInterpreter]: Interpreting procedure callOnFloor with input of size 129 for LOIs [2023-03-31 23:35:56,489 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 119 for LOIs [2023-03-31 23:35:56,519 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 212 for LOIs [2023-03-31 23:35:57,718 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 187 for LOIs [2023-03-31 23:35:57,791 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 116 for LOIs [2023-03-31 23:35:57,808 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 116 for LOIs [2023-03-31 23:35:57,824 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 47 for LOIs [2023-03-31 23:35:57,829 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 116 for LOIs [2023-03-31 23:35:57,852 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 116 for LOIs [2023-03-31 23:35:57,868 INFO L180 IcfgInterpreter]: Interpretation finished