/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_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:35:48,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:35:48,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:35:48,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:35:48,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:35:48,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:35:48,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:35:48,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:35:48,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:35:48,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:35:48,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:35:48,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:35:48,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:35:48,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:35:48,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:35:48,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:35:48,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:35:48,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:35:48,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:35:48,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:35:48,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:35:48,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:35:48,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:35:48,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:35:48,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:35:48,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:35:48,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:35:48,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:35:48,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:35:48,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:35:48,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:35:48,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:35:48,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:35:48,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:35:48,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:35:48,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:35:48,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:35:48,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:35:48,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:35:48,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:35:48,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:35:48,374 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 23:35:48,397 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:35:48,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:35:48,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:35:48,398 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:35:48,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:35:48,398 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:35:48,399 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:35:48,399 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:35:48,399 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:35:48,399 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:35:48,399 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:35:48,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:35:48,400 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:35:48,400 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:35:48,400 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:35:48,400 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:35:48,400 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:35:48,400 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:35:48,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:35:48,401 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:35:48,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:35:48,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:35:48,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:35:48,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:35:48,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:35:48,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:35:48,402 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:35:48,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:35:48,402 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:35:48,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:35:48,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:35:48,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:35:48,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:35:48,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:35:48,403 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:35:48,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:35:48,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:35:48,403 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:35:48,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:35:48,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:35:48,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:35:48,404 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:35:48,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:35:48,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:35:48,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:35:48,570 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:35:48,570 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:35:48,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2023-03-31 23:35:49,487 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:35:49,701 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:35:49,705 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2023-03-31 23:35:49,729 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0413c66/b29143507b38421db37f4bfb07a60971/FLAGd8b703ceb [2023-03-31 23:35:49,741 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0413c66/b29143507b38421db37f4bfb07a60971 [2023-03-31 23:35:49,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:35:49,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:35:49,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:35:49,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:35:49,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:35:49,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:35:49" (1/1) ... [2023-03-31 23:35:49,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a0cea5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:49, skipping insertion in model container [2023-03-31 23:35:49,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:35:49" (1/1) ... [2023-03-31 23:35:49,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:35:49,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:35:49,933 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_product22.cil.c[3205,3218] [2023-03-31 23:35:50,170 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:35:50,180 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:35:50,190 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_product22.cil.c[3205,3218] [2023-03-31 23:35:50,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:35:50,295 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:35:50,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:50 WrapperNode [2023-03-31 23:35:50,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:35:50,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:35:50,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:35:50,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:35:50,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:50" (1/1) ... [2023-03-31 23:35:50,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:50" (1/1) ... [2023-03-31 23:35:50,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:50" (1/1) ... [2023-03-31 23:35:50,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:50" (1/1) ... [2023-03-31 23:35:50,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:50" (1/1) ... [2023-03-31 23:35:50,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:50" (1/1) ... [2023-03-31 23:35:50,384 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:50" (1/1) ... [2023-03-31 23:35:50,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:50" (1/1) ... [2023-03-31 23:35:50,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:35:50,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:35:50,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:35:50,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:35:50,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:50" (1/1) ... [2023-03-31 23:35:50,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:35:50,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:50,438 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 23:35:50,453 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 23:35:50,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:35:50,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:35:50,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-03-31 23:35:50,480 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:35:50,481 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-03-31 23:35:50,481 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-03-31 23:35:50,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-03-31 23:35:50,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-03-31 23:35:50,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-03-31 23:35:50,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-03-31 23:35:50,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-03-31 23:35:50,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-03-31 23:35:50,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-03-31 23:35:50,482 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-03-31 23:35:50,482 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-03-31 23:35:50,482 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-03-31 23:35:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-03-31 23:35:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2023-03-31 23:35:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2023-03-31 23:35:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-03-31 23:35:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-03-31 23:35:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-03-31 23:35:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-03-31 23:35:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-03-31 23:35:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-03-31 23:35:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-03-31 23:35:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-03-31 23:35:50,485 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-03-31 23:35:50,485 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-03-31 23:35:50,485 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-03-31 23:35:50,485 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-03-31 23:35:50,485 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-03-31 23:35:50,485 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-03-31 23:35:50,486 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-03-31 23:35:50,486 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-03-31 23:35:50,486 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-03-31 23:35:50,486 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-03-31 23:35:50,486 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-03-31 23:35:50,486 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-03-31 23:35:50,486 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-03-31 23:35:50,486 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-03-31 23:35:50,487 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-03-31 23:35:50,487 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-03-31 23:35:50,487 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-03-31 23:35:50,488 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-03-31 23:35:50,488 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-03-31 23:35:50,488 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-03-31 23:35:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-03-31 23:35:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-03-31 23:35:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-03-31 23:35:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-03-31 23:35:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-03-31 23:35:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-03-31 23:35:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-03-31 23:35:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-03-31 23:35:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-03-31 23:35:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-03-31 23:35:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-03-31 23:35:50,489 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-03-31 23:35:50,490 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2023-03-31 23:35:50,490 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-03-31 23:35:50,490 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2023-03-31 23:35:50,490 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-03-31 23:35:50,490 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-03-31 23:35:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:35:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:35:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:35:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:35:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:35:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-03-31 23:35:50,491 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-03-31 23:35:50,491 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-03-31 23:35:50,491 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-03-31 23:35:50,491 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-03-31 23:35:50,491 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-03-31 23:35:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-03-31 23:35:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-03-31 23:35:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-03-31 23:35:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-03-31 23:35:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 23:35:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 23:35:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-03-31 23:35:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 23:35:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 23:35:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:35:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 23:35:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-03-31 23:35:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:35:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-03-31 23:35:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-03-31 23:35:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:35:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-03-31 23:35:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-03-31 23:35:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-03-31 23:35:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-03-31 23:35:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-03-31 23:35:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-03-31 23:35:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-03-31 23:35:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-03-31 23:35:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-03-31 23:35:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-03-31 23:35:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2023-03-31 23:35:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2023-03-31 23:35:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 23:35:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-03-31 23:35:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-03-31 23:35:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-03-31 23:35:50,495 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-03-31 23:35:50,495 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-03-31 23:35:50,497 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-03-31 23:35:50,497 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-03-31 23:35:50,501 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-03-31 23:35:50,501 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-03-31 23:35:50,501 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-03-31 23:35:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-03-31 23:35:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-03-31 23:35:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-03-31 23:35:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-03-31 23:35:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-03-31 23:35:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-03-31 23:35:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-03-31 23:35:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-03-31 23:35:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:35:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-03-31 23:35:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-03-31 23:35:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-03-31 23:35:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-03-31 23:35:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-03-31 23:35:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-03-31 23:35:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-03-31 23:35:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-03-31 23:35:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-03-31 23:35:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-03-31 23:35:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-03-31 23:35:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-03-31 23:35:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2023-03-31 23:35:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2023-03-31 23:35:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-03-31 23:35:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:35:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:35:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:35:50,751 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:35:50,754 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:35:51,700 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:35:52,333 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:35:52,334 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-03-31 23:35:52,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:35:52 BoogieIcfgContainer [2023-03-31 23:35:52,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:35:52,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:35:52,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:35:52,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:35:52,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:35:49" (1/3) ... [2023-03-31 23:35:52,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7571615b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:35:52, skipping insertion in model container [2023-03-31 23:35:52,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:35:50" (2/3) ... [2023-03-31 23:35:52,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7571615b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:35:52, skipping insertion in model container [2023-03-31 23:35:52,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:35:52" (3/3) ... [2023-03-31 23:35:52,344 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product22.cil.c [2023-03-31 23:35:52,357 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:35:52,357 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:35:52,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:35:52,419 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;@52ab89b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:35:52,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:35:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 608 states, 355 states have (on average 1.476056338028169) internal successors, (524), 380 states have internal predecessors, (524), 186 states have call successors, (186), 53 states have call predecessors, (186), 53 states have return successors, (186), 179 states have call predecessors, (186), 186 states have call successors, (186) [2023-03-31 23:35:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-31 23:35:52,436 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:52,437 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] [2023-03-31 23:35:52,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:52,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:52,442 INFO L85 PathProgramCache]: Analyzing trace with hash 888027049, now seen corresponding path program 1 times [2023-03-31 23:35:52,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:52,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351021763] [2023-03-31 23:35:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:52,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:35:53,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:53,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351021763] [2023-03-31 23:35:53,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351021763] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:53,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864973760] [2023-03-31 23:35:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:53,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:53,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:53,328 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 23:35:53,329 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 23:35:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:53,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 2606 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 23:35:53,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:35:53,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:35:53,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864973760] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:53,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:35:53,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-03-31 23:35:53,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941219332] [2023-03-31 23:35:53,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:53,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:35:53,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:53,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:35:53,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:35:53,967 INFO L87 Difference]: Start difference. First operand has 608 states, 355 states have (on average 1.476056338028169) internal successors, (524), 380 states have internal predecessors, (524), 186 states have call successors, (186), 53 states have call predecessors, (186), 53 states have return successors, (186), 179 states have call predecessors, (186), 186 states have call successors, (186) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-03-31 23:35:54,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:54,197 INFO L93 Difference]: Finished difference Result 1328 states and 2022 transitions. [2023-03-31 23:35:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:35:54,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 81 [2023-03-31 23:35:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:54,219 INFO L225 Difference]: With dead ends: 1328 [2023-03-31 23:35:54,219 INFO L226 Difference]: Without dead ends: 858 [2023-03-31 23:35:54,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 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 23:35:54,230 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 591 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:54,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1390 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:35:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2023-03-31 23:35:54,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 845. [2023-03-31 23:35:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 538 states have (on average 1.520446096654275) internal successors, (818), 573 states have internal predecessors, (818), 225 states have call successors, (225), 83 states have call predecessors, (225), 81 states have return successors, (227), 214 states have call predecessors, (227), 219 states have call successors, (227) [2023-03-31 23:35:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1270 transitions. [2023-03-31 23:35:54,339 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1270 transitions. Word has length 81 [2023-03-31 23:35:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:54,339 INFO L495 AbstractCegarLoop]: Abstraction has 845 states and 1270 transitions. [2023-03-31 23:35:54,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-03-31 23:35:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1270 transitions. [2023-03-31 23:35:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-03-31 23:35:54,342 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:54,342 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] [2023-03-31 23:35:54,357 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 23:35:54,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 23:35:54,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:54,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:54,553 INFO L85 PathProgramCache]: Analyzing trace with hash -746941688, now seen corresponding path program 1 times [2023-03-31 23:35:54,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:54,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740822648] [2023-03-31 23:35:54,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:54,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:35:55,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:55,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740822648] [2023-03-31 23:35:55,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740822648] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:55,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650330052] [2023-03-31 23:35:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:55,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:55,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:55,004 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 23:35:55,007 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 23:35:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:55,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 2594 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 23:35:55,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:35:55,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:35:55,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650330052] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:55,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:35:55,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-03-31 23:35:55,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149005056] [2023-03-31 23:35:55,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:55,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:35:55,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:55,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:35:55,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:35:55,529 INFO L87 Difference]: Start difference. First operand 845 states and 1270 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-03-31 23:35:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:55,644 INFO L93 Difference]: Finished difference Result 2047 states and 3124 transitions. [2023-03-31 23:35:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:35:55,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 80 [2023-03-31 23:35:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:55,650 INFO L225 Difference]: With dead ends: 2047 [2023-03-31 23:35:55,650 INFO L226 Difference]: Without dead ends: 1233 [2023-03-31 23:35:55,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 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 23:35:55,654 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 660 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:55,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 1215 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:35:55,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2023-03-31 23:35:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1203. [2023-03-31 23:35:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 773 states have (on average 1.5291073738680465) internal successors, (1182), 825 states have internal predecessors, (1182), 316 states have call successors, (316), 113 states have call predecessors, (316), 113 states have return successors, (325), 303 states have call predecessors, (325), 310 states have call successors, (325) [2023-03-31 23:35:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1823 transitions. [2023-03-31 23:35:55,691 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1823 transitions. Word has length 80 [2023-03-31 23:35:55,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:55,692 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 1823 transitions. [2023-03-31 23:35:55,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-03-31 23:35:55,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1823 transitions. [2023-03-31 23:35:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-31 23:35:55,694 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:55,694 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] [2023-03-31 23:35:55,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 23:35:55,902 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,SelfDestructingSolverStorable1 [2023-03-31 23:35:55,902 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:55,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:55,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1538430147, now seen corresponding path program 1 times [2023-03-31 23:35:55,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:55,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265411191] [2023-03-31 23:35:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:55,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:56,227 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 23:35:56,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:56,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265411191] [2023-03-31 23:35:56,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265411191] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:56,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:35:56,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 23:35:56,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000708124] [2023-03-31 23:35:56,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:56,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:35:56,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:56,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:35:56,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:35:56,229 INFO L87 Difference]: Start difference. First operand 1203 states and 1823 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-03-31 23:35:56,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:56,496 INFO L93 Difference]: Finished difference Result 3541 states and 5438 transitions. [2023-03-31 23:35:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:35:56,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 81 [2023-03-31 23:35:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:56,509 INFO L225 Difference]: With dead ends: 3541 [2023-03-31 23:35:56,509 INFO L226 Difference]: Without dead ends: 2369 [2023-03-31 23:35:56,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:35:56,517 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 663 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:56,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1338 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:35:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2023-03-31 23:35:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2228. [2023-03-31 23:35:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 1484 states have (on average 1.5491913746630728) internal successors, (2299), 1565 states have internal predecessors, (2299), 547 states have call successors, (547), 192 states have call predecessors, (547), 196 states have return successors, (592), 509 states have call predecessors, (592), 540 states have call successors, (592) [2023-03-31 23:35:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 3438 transitions. [2023-03-31 23:35:56,596 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 3438 transitions. Word has length 81 [2023-03-31 23:35:56,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:56,597 INFO L495 AbstractCegarLoop]: Abstraction has 2228 states and 3438 transitions. [2023-03-31 23:35:56,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-03-31 23:35:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 3438 transitions. [2023-03-31 23:35:56,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-31 23:35:56,605 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:56,606 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:35:56,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 23:35:56,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:56,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:56,607 INFO L85 PathProgramCache]: Analyzing trace with hash -942659494, now seen corresponding path program 1 times [2023-03-31 23:35:56,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:56,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872127034] [2023-03-31 23:35:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:56,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:35:57,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:57,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872127034] [2023-03-31 23:35:57,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872127034] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:35:57,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:35:57,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-03-31 23:35:57,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398102222] [2023-03-31 23:35:57,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:57,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 23:35:57,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:57,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 23:35:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:35:57,193 INFO L87 Difference]: Start difference. First operand 2228 states and 3438 transitions. Second operand has 10 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 4 states have call successors, (32), 4 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) [2023-03-31 23:35:57,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:57,953 INFO L93 Difference]: Finished difference Result 5139 states and 7938 transitions. [2023-03-31 23:35:57,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:35:57,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 4 states have call successors, (32), 4 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) Word has length 122 [2023-03-31 23:35:57,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:57,967 INFO L225 Difference]: With dead ends: 5139 [2023-03-31 23:35:57,968 INFO L226 Difference]: Without dead ends: 2942 [2023-03-31 23:35:57,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-03-31 23:35:57,978 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 489 mSDsluCounter, 4389 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 5094 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:57,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 5094 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 23:35:57,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2023-03-31 23:35:58,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2909. [2023-03-31 23:35:58,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 1898 states have (on average 1.4889357218124342) internal successors, (2826), 1980 states have internal predecessors, (2826), 708 states have call successors, (708), 278 states have call predecessors, (708), 302 states have return successors, (918), 692 states have call predecessors, (918), 699 states have call successors, (918) [2023-03-31 23:35:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 4452 transitions. [2023-03-31 23:35:58,112 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 4452 transitions. Word has length 122 [2023-03-31 23:35:58,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:35:58,112 INFO L495 AbstractCegarLoop]: Abstraction has 2909 states and 4452 transitions. [2023-03-31 23:35:58,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 4 states have call successors, (32), 4 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) [2023-03-31 23:35:58,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 4452 transitions. [2023-03-31 23:35:58,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-03-31 23:35:58,116 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:35:58,117 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:35:58,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 23:35:58,117 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:35:58,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:35:58,117 INFO L85 PathProgramCache]: Analyzing trace with hash -238925236, now seen corresponding path program 1 times [2023-03-31 23:35:58,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:35:58,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286888607] [2023-03-31 23:35:58,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:58,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:35:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:58,464 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 23:35:58,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:35:58,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286888607] [2023-03-31 23:35:58,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286888607] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:58,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109308483] [2023-03-31 23:35:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:35:58,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:35:58,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:35:58,466 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 23:35:58,468 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 23:35:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:35:58,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 2947 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 23:35:58,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:35:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:35:59,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:35:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:35:59,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109308483] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:35:59,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:35:59,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-03-31 23:35:59,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995052732] [2023-03-31 23:35:59,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:35:59,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:35:59,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:35:59,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:35:59,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-03-31 23:35:59,248 INFO L87 Difference]: Start difference. First operand 2909 states and 4452 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 5 states have call successors, (32), 4 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2023-03-31 23:36:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:00,847 INFO L93 Difference]: Finished difference Result 8280 states and 12974 transitions. [2023-03-31 23:36:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:36:00,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 5 states have call successors, (32), 4 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 123 [2023-03-31 23:36:00,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:00,872 INFO L225 Difference]: With dead ends: 8280 [2023-03-31 23:36:00,872 INFO L226 Difference]: Without dead ends: 5404 [2023-03-31 23:36:00,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:36:00,885 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 1220 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:00,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1319 Valid, 1243 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 23:36:00,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5404 states. [2023-03-31 23:36:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5404 to 5167. [2023-03-31 23:36:01,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5167 states, 3362 states have (on average 1.4506246281975015) internal successors, (4877), 3529 states have internal predecessors, (4877), 1264 states have call successors, (1264), 502 states have call predecessors, (1264), 540 states have return successors, (1654), 1216 states have call predecessors, (1654), 1253 states have call successors, (1654) [2023-03-31 23:36:01,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5167 states to 5167 states and 7795 transitions. [2023-03-31 23:36:01,105 INFO L78 Accepts]: Start accepts. Automaton has 5167 states and 7795 transitions. Word has length 123 [2023-03-31 23:36:01,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:01,106 INFO L495 AbstractCegarLoop]: Abstraction has 5167 states and 7795 transitions. [2023-03-31 23:36:01,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 5 states have call successors, (32), 4 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2023-03-31 23:36:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 5167 states and 7795 transitions. [2023-03-31 23:36:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-03-31 23:36:01,110 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:01,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:01,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:36:01,318 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 23:36:01,320 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:01,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:01,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2043112371, now seen corresponding path program 1 times [2023-03-31 23:36:01,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:01,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314967292] [2023-03-31 23:36:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:01,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:01,635 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 23:36:01,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:01,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314967292] [2023-03-31 23:36:01,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314967292] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:01,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328350140] [2023-03-31 23:36:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:01,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:01,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:01,637 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 23:36:01,639 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 23:36:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:02,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 2964 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 23:36:02,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:36:02,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:36:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:36:02,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328350140] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:02,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:36:02,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2023-03-31 23:36:02,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838841816] [2023-03-31 23:36:02,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:02,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:36:02,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:02,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:36:02,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-03-31 23:36:02,626 INFO L87 Difference]: Start difference. First operand 5167 states and 7795 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 7 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2023-03-31 23:36:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:04,642 INFO L93 Difference]: Finished difference Result 10016 states and 15445 transitions. [2023-03-31 23:36:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-31 23:36:04,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 7 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) Word has length 128 [2023-03-31 23:36:04,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:04,675 INFO L225 Difference]: With dead ends: 10016 [2023-03-31 23:36:04,675 INFO L226 Difference]: Without dead ends: 6341 [2023-03-31 23:36:04,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 244 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:36:04,691 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 1391 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 2640 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 2052 SdHoareTripleChecker+Invalid, 2806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:04,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 2052 Invalid, 2806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2640 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-31 23:36:04,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6341 states. [2023-03-31 23:36:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6341 to 5929. [2023-03-31 23:36:05,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5929 states, 3932 states have (on average 1.4585452695829095) internal successors, (5735), 4099 states have internal predecessors, (5735), 1396 states have call successors, (1396), 538 states have call predecessors, (1396), 600 states have return successors, (1870), 1372 states have call predecessors, (1870), 1385 states have call successors, (1870) [2023-03-31 23:36:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5929 states to 5929 states and 9001 transitions. [2023-03-31 23:36:05,046 INFO L78 Accepts]: Start accepts. Automaton has 5929 states and 9001 transitions. Word has length 128 [2023-03-31 23:36:05,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:05,047 INFO L495 AbstractCegarLoop]: Abstraction has 5929 states and 9001 transitions. [2023-03-31 23:36:05,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 7 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2023-03-31 23:36:05,048 INFO L276 IsEmpty]: Start isEmpty. Operand 5929 states and 9001 transitions. [2023-03-31 23:36:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-03-31 23:36:05,053 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:05,053 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:05,077 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 23:36:05,259 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 23:36:05,260 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:05,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:05,260 INFO L85 PathProgramCache]: Analyzing trace with hash 399300202, now seen corresponding path program 1 times [2023-03-31 23:36:05,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:05,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474719971] [2023-03-31 23:36:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:05,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:05,594 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 23:36:05,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:05,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474719971] [2023-03-31 23:36:05,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474719971] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:05,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008070235] [2023-03-31 23:36:05,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:05,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:05,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:05,595 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 23:36:05,624 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 23:36:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:06,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 2952 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 23:36:06,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:06,191 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 23:36:06,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:36:06,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008070235] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:06,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:36:06,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-03-31 23:36:06,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868054837] [2023-03-31 23:36:06,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:06,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:36:06,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:06,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:36:06,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-03-31 23:36:06,193 INFO L87 Difference]: Start difference. First operand 5929 states and 9001 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-03-31 23:36:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:06,627 INFO L93 Difference]: Finished difference Result 11782 states and 18281 transitions. [2023-03-31 23:36:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:36:06,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 128 [2023-03-31 23:36:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:06,676 INFO L225 Difference]: With dead ends: 11782 [2023-03-31 23:36:06,677 INFO L226 Difference]: Without dead ends: 7225 [2023-03-31 23:36:06,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-03-31 23:36:06,703 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 306 mSDsluCounter, 2567 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 3284 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:06,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 3284 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:36:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7225 states. [2023-03-31 23:36:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7225 to 7225. [2023-03-31 23:36:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7225 states, 5042 states have (on average 1.493256644188814) internal successors, (7529), 5221 states have internal predecessors, (7529), 1546 states have call successors, (1546), 562 states have call predecessors, (1546), 636 states have return successors, (2020), 1522 states have call predecessors, (2020), 1535 states have call successors, (2020) [2023-03-31 23:36:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7225 states to 7225 states and 11095 transitions. [2023-03-31 23:36:07,115 INFO L78 Accepts]: Start accepts. Automaton has 7225 states and 11095 transitions. Word has length 128 [2023-03-31 23:36:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:07,116 INFO L495 AbstractCegarLoop]: Abstraction has 7225 states and 11095 transitions. [2023-03-31 23:36:07,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-03-31 23:36:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7225 states and 11095 transitions. [2023-03-31 23:36:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-03-31 23:36:07,121 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:07,121 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:07,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:36:07,329 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 23:36:07,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:07,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:07,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1317790395, now seen corresponding path program 1 times [2023-03-31 23:36:07,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:07,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242490622] [2023-03-31 23:36:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:07,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:07,638 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 23:36:07,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:07,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242490622] [2023-03-31 23:36:07,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242490622] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:07,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005542249] [2023-03-31 23:36:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:07,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:07,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:07,640 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 23:36:07,642 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 23:36:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:08,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 2952 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-31 23:36:08,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:36:08,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:36:08,611 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 23:36:08,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005542249] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:08,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:36:08,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 9] total 18 [2023-03-31 23:36:08,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209930147] [2023-03-31 23:36:08,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:08,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 23:36:08,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:08,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 23:36:08,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2023-03-31 23:36:08,612 INFO L87 Difference]: Start difference. First operand 7225 states and 11095 transitions. Second operand has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (32), 6 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) [2023-03-31 23:36:11,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:11,679 INFO L93 Difference]: Finished difference Result 12278 states and 19543 transitions. [2023-03-31 23:36:11,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-31 23:36:11,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (32), 6 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) Word has length 129 [2023-03-31 23:36:11,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:11,740 INFO L225 Difference]: With dead ends: 12278 [2023-03-31 23:36:11,740 INFO L226 Difference]: Without dead ends: 12275 [2023-03-31 23:36:11,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 252 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:36:11,753 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 3813 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 3189 mSolverCounterSat, 1740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3919 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 4929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1740 IncrementalHoareTripleChecker+Valid, 3189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:11,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3919 Valid, 2783 Invalid, 4929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1740 Valid, 3189 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-03-31 23:36:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12275 states. [2023-03-31 23:36:12,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12275 to 11832. [2023-03-31 23:36:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11832 states, 8286 states have (on average 1.4833454018826937) internal successors, (12291), 8555 states have internal predecessors, (12291), 2459 states have call successors, (2459), 908 states have call predecessors, (2459), 1086 states have return successors, (3735), 2485 states have call predecessors, (3735), 2444 states have call successors, (3735) [2023-03-31 23:36:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11832 states to 11832 states and 18485 transitions. [2023-03-31 23:36:12,439 INFO L78 Accepts]: Start accepts. Automaton has 11832 states and 18485 transitions. Word has length 129 [2023-03-31 23:36:12,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:12,439 INFO L495 AbstractCegarLoop]: Abstraction has 11832 states and 18485 transitions. [2023-03-31 23:36:12,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (32), 6 states have call predecessors, (32), 4 states have return successors, (25), 6 states have call predecessors, (25), 4 states have call successors, (25) [2023-03-31 23:36:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 11832 states and 18485 transitions. [2023-03-31 23:36:12,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-03-31 23:36:12,447 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:12,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:12,472 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 23:36:12,655 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 23:36:12,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:12,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1661547206, now seen corresponding path program 1 times [2023-03-31 23:36:12,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:12,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836741946] [2023-03-31 23:36:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:12,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:13,001 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 23:36:13,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:13,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836741946] [2023-03-31 23:36:13,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836741946] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:13,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400559716] [2023-03-31 23:36:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:13,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:13,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:13,002 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 23:36:13,005 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 23:36:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:13,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 2942 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 23:36:13,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:13,510 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 23:36:13,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:36:13,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400559716] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:13,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:36:13,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-03-31 23:36:13,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670591457] [2023-03-31 23:36:13,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:13,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:36:13,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:13,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:36:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:36:13,513 INFO L87 Difference]: Start difference. First operand 11832 states and 18485 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-03-31 23:36:14,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:14,233 INFO L93 Difference]: Finished difference Result 27508 states and 44305 transitions. [2023-03-31 23:36:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:36:14,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 129 [2023-03-31 23:36:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:14,315 INFO L225 Difference]: With dead ends: 27508 [2023-03-31 23:36:14,315 INFO L226 Difference]: Without dead ends: 15707 [2023-03-31 23:36:14,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 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 23:36:14,354 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 610 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:14,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 1272 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:36:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15707 states. [2023-03-31 23:36:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15707 to 11772. [2023-03-31 23:36:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11772 states, 8246 states have (on average 1.4808391947610964) internal successors, (12211), 8505 states have internal predecessors, (12211), 2449 states have call successors, (2449), 908 states have call predecessors, (2449), 1076 states have return successors, (3653), 2475 states have call predecessors, (3653), 2434 states have call successors, (3653) [2023-03-31 23:36:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11772 states to 11772 states and 18313 transitions. [2023-03-31 23:36:15,098 INFO L78 Accepts]: Start accepts. Automaton has 11772 states and 18313 transitions. Word has length 129 [2023-03-31 23:36:15,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:15,099 INFO L495 AbstractCegarLoop]: Abstraction has 11772 states and 18313 transitions. [2023-03-31 23:36:15,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-03-31 23:36:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 11772 states and 18313 transitions. [2023-03-31 23:36:15,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-03-31 23:36:15,104 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:15,104 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:15,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 23:36:15,313 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 23:36:15,315 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:15,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:15,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1509875015, now seen corresponding path program 1 times [2023-03-31 23:36:15,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:15,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230601063] [2023-03-31 23:36:15,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:15,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:15,640 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 23:36:15,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:15,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230601063] [2023-03-31 23:36:15,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230601063] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:15,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671869909] [2023-03-31 23:36:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:15,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:15,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:15,642 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 23:36:15,644 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 23:36:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:16,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 2954 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 23:36:16,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:16,181 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 23:36:16,181 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:36:16,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671869909] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:16,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:36:16,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2023-03-31 23:36:16,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493528464] [2023-03-31 23:36:16,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:16,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:36:16,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:16,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:36:16,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:36:16,183 INFO L87 Difference]: Start difference. First operand 11772 states and 18313 transitions. Second operand has 6 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 4 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2023-03-31 23:36:17,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:17,458 INFO L93 Difference]: Finished difference Result 24297 states and 38889 transitions. [2023-03-31 23:36:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:36:17,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 4 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) Word has length 130 [2023-03-31 23:36:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:17,516 INFO L225 Difference]: With dead ends: 24297 [2023-03-31 23:36:17,516 INFO L226 Difference]: Without dead ends: 12556 [2023-03-31 23:36:17,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:36:17,558 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 518 mSDsluCounter, 2049 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 2764 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:17,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 2764 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1124 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 23:36:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12556 states. [2023-03-31 23:36:18,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12556 to 12366. [2023-03-31 23:36:18,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12366 states, 8800 states have (on average 1.4413636363636364) internal successors, (12684), 9054 states have internal predecessors, (12684), 2467 states have call successors, (2467), 942 states have call predecessors, (2467), 1098 states have return successors, (3767), 2473 states have call predecessors, (3767), 2452 states have call successors, (3767) [2023-03-31 23:36:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12366 states to 12366 states and 18918 transitions. [2023-03-31 23:36:18,328 INFO L78 Accepts]: Start accepts. Automaton has 12366 states and 18918 transitions. Word has length 130 [2023-03-31 23:36:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:18,329 INFO L495 AbstractCegarLoop]: Abstraction has 12366 states and 18918 transitions. [2023-03-31 23:36:18,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 4 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2023-03-31 23:36:18,329 INFO L276 IsEmpty]: Start isEmpty. Operand 12366 states and 18918 transitions. [2023-03-31 23:36:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-03-31 23:36:18,332 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:18,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:18,341 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 23:36:18,541 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 23:36:18,541 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:18,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:18,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1178154044, now seen corresponding path program 1 times [2023-03-31 23:36:18,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:18,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324973745] [2023-03-31 23:36:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:18,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:18,813 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 23:36:18,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:18,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324973745] [2023-03-31 23:36:18,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324973745] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:18,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545465632] [2023-03-31 23:36:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:18,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:18,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:18,815 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 23:36:18,844 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 23:36:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:19,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 2969 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 23:36:19,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:36:19,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:36:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:36:19,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545465632] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:19,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:36:19,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 14 [2023-03-31 23:36:19,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896941345] [2023-03-31 23:36:19,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:19,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:36:19,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:19,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:36:19,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-03-31 23:36:19,637 INFO L87 Difference]: Start difference. First operand 12366 states and 18918 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 5 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2023-03-31 23:36:21,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:21,571 INFO L93 Difference]: Finished difference Result 23572 states and 36577 transitions. [2023-03-31 23:36:21,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:36:21,574 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 5 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) Word has length 133 [2023-03-31 23:36:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:21,640 INFO L225 Difference]: With dead ends: 23572 [2023-03-31 23:36:21,640 INFO L226 Difference]: Without dead ends: 12838 [2023-03-31 23:36:21,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 258 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:36:21,680 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 1071 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 2488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:21,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1180 Valid, 1548 Invalid, 2488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 23:36:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12838 states. [2023-03-31 23:36:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12838 to 12374. [2023-03-31 23:36:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12374 states, 8800 states have (on average 1.4413636363636364) internal successors, (12684), 9062 states have internal predecessors, (12684), 2475 states have call successors, (2475), 942 states have call predecessors, (2475), 1098 states have return successors, (3775), 2473 states have call predecessors, (3775), 2460 states have call successors, (3775) [2023-03-31 23:36:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12374 states to 12374 states and 18934 transitions. [2023-03-31 23:36:22,360 INFO L78 Accepts]: Start accepts. Automaton has 12374 states and 18934 transitions. Word has length 133 [2023-03-31 23:36:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:22,361 INFO L495 AbstractCegarLoop]: Abstraction has 12374 states and 18934 transitions. [2023-03-31 23:36:22,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 5 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2023-03-31 23:36:22,361 INFO L276 IsEmpty]: Start isEmpty. Operand 12374 states and 18934 transitions. [2023-03-31 23:36:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-03-31 23:36:22,365 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:22,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:22,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 23:36:22,575 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 23:36:22,575 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:22,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:22,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1974995722, now seen corresponding path program 1 times [2023-03-31 23:36:22,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:22,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443764319] [2023-03-31 23:36:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:22,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 23:36:22,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:22,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443764319] [2023-03-31 23:36:22,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443764319] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:22,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548908180] [2023-03-31 23:36:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:22,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:22,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:22,867 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 23:36:22,888 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 23:36:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:23,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 3083 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 23:36:23,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:36:23,343 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:36:23,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548908180] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:23,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:36:23,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-03-31 23:36:23,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670327551] [2023-03-31 23:36:23,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:23,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:36:23,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:23,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:36:23,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:36:23,345 INFO L87 Difference]: Start difference. First operand 12374 states and 18934 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (32), 4 states have call predecessors, (32), 2 states have call successors, (32) [2023-03-31 23:36:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:24,002 INFO L93 Difference]: Finished difference Result 24198 states and 37839 transitions. [2023-03-31 23:36:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:36:24,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (32), 4 states have call predecessors, (32), 2 states have call successors, (32) Word has length 166 [2023-03-31 23:36:24,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:24,063 INFO L225 Difference]: With dead ends: 24198 [2023-03-31 23:36:24,063 INFO L226 Difference]: Without dead ends: 12864 [2023-03-31 23:36:24,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:36:24,108 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 2 mSDsluCounter, 3306 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3974 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:24,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3974 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:36:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12864 states. [2023-03-31 23:36:24,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12864 to 12666. [2023-03-31 23:36:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12666 states, 8996 states have (on average 1.431747443308137) internal successors, (12880), 9280 states have internal predecessors, (12880), 2475 states have call successors, (2475), 942 states have call predecessors, (2475), 1194 states have return successors, (4063), 2547 states have call predecessors, (4063), 2460 states have call successors, (4063) [2023-03-31 23:36:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12666 states to 12666 states and 19418 transitions. [2023-03-31 23:36:24,855 INFO L78 Accepts]: Start accepts. Automaton has 12666 states and 19418 transitions. Word has length 166 [2023-03-31 23:36:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:24,856 INFO L495 AbstractCegarLoop]: Abstraction has 12666 states and 19418 transitions. [2023-03-31 23:36:24,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (32), 4 states have call predecessors, (32), 2 states have call successors, (32) [2023-03-31 23:36:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 12666 states and 19418 transitions. [2023-03-31 23:36:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-03-31 23:36:24,861 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:24,861 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:36:24,869 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 23:36:25,069 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 23:36:25,070 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:25,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:25,070 INFO L85 PathProgramCache]: Analyzing trace with hash 18388678, now seen corresponding path program 1 times [2023-03-31 23:36:25,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:25,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347127522] [2023-03-31 23:36:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:25,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 23:36:25,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:25,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347127522] [2023-03-31 23:36:25,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347127522] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:25,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165224544] [2023-03-31 23:36:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:25,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:25,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:25,399 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 23:36:25,428 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 23:36:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:25,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 3095 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 23:36:25,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:36:25,886 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:36:25,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165224544] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:25,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:36:25,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-03-31 23:36:25,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842811522] [2023-03-31 23:36:25,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:25,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:36:25,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:25,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:36:25,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:36:25,887 INFO L87 Difference]: Start difference. First operand 12666 states and 19418 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) [2023-03-31 23:36:26,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:26,593 INFO L93 Difference]: Finished difference Result 24678 states and 38643 transitions. [2023-03-31 23:36:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:36:26,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) Word has length 165 [2023-03-31 23:36:26,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:26,640 INFO L225 Difference]: With dead ends: 24678 [2023-03-31 23:36:26,640 INFO L226 Difference]: Without dead ends: 13060 [2023-03-31 23:36:26,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:36:26,677 INFO L413 NwaCegarLoop]: 675 mSDtfsCounter, 2 mSDsluCounter, 3335 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4010 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:26,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4010 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:36:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13060 states. [2023-03-31 23:36:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13060 to 12810. [2023-03-31 23:36:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12810 states, 9092 states have (on average 1.4271887373515177) internal successors, (12976), 9376 states have internal predecessors, (12976), 2475 states have call successors, (2475), 942 states have call predecessors, (2475), 1242 states have return successors, (4271), 2595 states have call predecessors, (4271), 2460 states have call successors, (4271) [2023-03-31 23:36:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12810 states to 12810 states and 19722 transitions. [2023-03-31 23:36:27,254 INFO L78 Accepts]: Start accepts. Automaton has 12810 states and 19722 transitions. Word has length 165 [2023-03-31 23:36:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:27,255 INFO L495 AbstractCegarLoop]: Abstraction has 12810 states and 19722 transitions. [2023-03-31 23:36:27,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) [2023-03-31 23:36:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 12810 states and 19722 transitions. [2023-03-31 23:36:27,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-03-31 23:36:27,259 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:27,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:27,267 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 23:36:27,467 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 23:36:27,467 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:27,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:27,468 INFO L85 PathProgramCache]: Analyzing trace with hash 418818807, now seen corresponding path program 1 times [2023-03-31 23:36:27,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:27,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831792840] [2023-03-31 23:36:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:27,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-03-31 23:36:27,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:27,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831792840] [2023-03-31 23:36:27,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831792840] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:27,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296345416] [2023-03-31 23:36:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:27,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:27,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:27,790 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 23:36:27,823 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 23:36:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:28,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 3094 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 23:36:28,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:36:28,322 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:36:28,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296345416] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:28,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:36:28,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-03-31 23:36:28,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297998232] [2023-03-31 23:36:28,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:28,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:36:28,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:36:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:36:28,324 INFO L87 Difference]: Start difference. First operand 12810 states and 19722 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) [2023-03-31 23:36:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:28,942 INFO L93 Difference]: Finished difference Result 24870 states and 38995 transitions. [2023-03-31 23:36:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:36:28,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) Word has length 164 [2023-03-31 23:36:28,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:29,004 INFO L225 Difference]: With dead ends: 24870 [2023-03-31 23:36:29,004 INFO L226 Difference]: Without dead ends: 13108 [2023-03-31 23:36:29,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:36:29,050 INFO L413 NwaCegarLoop]: 675 mSDtfsCounter, 2 mSDsluCounter, 3335 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4010 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:29,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4010 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:36:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13108 states. [2023-03-31 23:36:29,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13108 to 12858. [2023-03-31 23:36:29,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12858 states, 9140 states have (on average 1.424945295404814) internal successors, (13024), 9376 states have internal predecessors, (13024), 2475 states have call successors, (2475), 942 states have call predecessors, (2475), 1242 states have return successors, (4271), 2643 states have call predecessors, (4271), 2460 states have call successors, (4271) [2023-03-31 23:36:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12858 states to 12858 states and 19770 transitions. [2023-03-31 23:36:29,726 INFO L78 Accepts]: Start accepts. Automaton has 12858 states and 19770 transitions. Word has length 164 [2023-03-31 23:36:29,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:29,727 INFO L495 AbstractCegarLoop]: Abstraction has 12858 states and 19770 transitions. [2023-03-31 23:36:29,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) [2023-03-31 23:36:29,727 INFO L276 IsEmpty]: Start isEmpty. Operand 12858 states and 19770 transitions. [2023-03-31 23:36:29,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-03-31 23:36:29,731 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:29,732 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:29,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-31 23:36:29,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-03-31 23:36:29,936 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:29,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:29,937 INFO L85 PathProgramCache]: Analyzing trace with hash -932943247, now seen corresponding path program 1 times [2023-03-31 23:36:29,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:29,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326349471] [2023-03-31 23:36:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:29,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 23:36:30,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:30,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326349471] [2023-03-31 23:36:30,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326349471] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:30,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908897520] [2023-03-31 23:36:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:30,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:30,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:30,235 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:36:30,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-31 23:36:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:30,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 3099 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 23:36:30,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:36:30,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:36:30,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908897520] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:36:30,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:36:30,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-03-31 23:36:30,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381433265] [2023-03-31 23:36:30,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:30,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:36:30,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:36:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-03-31 23:36:30,728 INFO L87 Difference]: Start difference. First operand 12858 states and 19770 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (32), 4 states have call predecessors, (32), 3 states have call successors, (32) [2023-03-31 23:36:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:31,566 INFO L93 Difference]: Finished difference Result 28144 states and 44439 transitions. [2023-03-31 23:36:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:36:31,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (32), 4 states have call predecessors, (32), 3 states have call successors, (32) Word has length 179 [2023-03-31 23:36:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:31,617 INFO L225 Difference]: With dead ends: 28144 [2023-03-31 23:36:31,617 INFO L226 Difference]: Without dead ends: 12858 [2023-03-31 23:36:31,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-03-31 23:36:31,663 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 248 mSDsluCounter, 2515 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 3208 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:31,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 3208 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:36:31,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12858 states. [2023-03-31 23:36:32,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12858 to 12858. [2023-03-31 23:36:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12858 states, 9140 states have (on average 1.387308533916849) internal successors, (12680), 9376 states have internal predecessors, (12680), 2475 states have call successors, (2475), 942 states have call predecessors, (2475), 1242 states have return successors, (4271), 2643 states have call predecessors, (4271), 2460 states have call successors, (4271) [2023-03-31 23:36:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12858 states to 12858 states and 19426 transitions. [2023-03-31 23:36:32,401 INFO L78 Accepts]: Start accepts. Automaton has 12858 states and 19426 transitions. Word has length 179 [2023-03-31 23:36:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:32,402 INFO L495 AbstractCegarLoop]: Abstraction has 12858 states and 19426 transitions. [2023-03-31 23:36:32,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (32), 4 states have call predecessors, (32), 3 states have call successors, (32) [2023-03-31 23:36:32,402 INFO L276 IsEmpty]: Start isEmpty. Operand 12858 states and 19426 transitions. [2023-03-31 23:36:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-03-31 23:36:32,407 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:32,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:32,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-03-31 23:36:32,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-03-31 23:36:32,616 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:32,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:32,617 INFO L85 PathProgramCache]: Analyzing trace with hash 875470081, now seen corresponding path program 1 times [2023-03-31 23:36:32,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:32,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013214636] [2023-03-31 23:36:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:32,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:36:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 23:36:32,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:36:32,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013214636] [2023-03-31 23:36:32,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013214636] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:32,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020431225] [2023-03-31 23:36:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:32,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:32,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:36:32,907 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:36:32,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-03-31 23:36:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:36:33,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 3103 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:36:33,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:36:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-03-31 23:36:33,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:36:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-03-31 23:36:34,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020431225] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:36:34,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:36:34,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 18 [2023-03-31 23:36:34,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734740770] [2023-03-31 23:36:34,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:36:34,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:36:34,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:36:34,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:36:34,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-03-31 23:36:34,382 INFO L87 Difference]: Start difference. First operand 12858 states and 19426 transitions. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 6 states have call successors, (38), 4 states have call predecessors, (38), 4 states have return successors, (31), 5 states have call predecessors, (31), 6 states have call successors, (31) [2023-03-31 23:36:38,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:36:38,489 INFO L93 Difference]: Finished difference Result 34032 states and 52996 transitions. [2023-03-31 23:36:38,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:36:38,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 6 states have call successors, (38), 4 states have call predecessors, (38), 4 states have return successors, (31), 5 states have call predecessors, (31), 6 states have call successors, (31) Word has length 183 [2023-03-31 23:36:38,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:36:38,593 INFO L225 Difference]: With dead ends: 34032 [2023-03-31 23:36:38,594 INFO L226 Difference]: Without dead ends: 21205 [2023-03-31 23:36:38,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-03-31 23:36:38,639 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 2444 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 2538 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2583 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 3313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:36:38,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2583 Valid, 1621 Invalid, 3313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2538 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-03-31 23:36:38,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21205 states. [2023-03-31 23:36:40,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21205 to 20394. [2023-03-31 23:36:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20394 states, 14241 states have (on average 1.3892282845305808) internal successors, (19784), 14705 states have internal predecessors, (19784), 4218 states have call successors, (4218), 1419 states have call predecessors, (4218), 1934 states have return successors, (7421), 4445 states have call predecessors, (7421), 4198 states have call successors, (7421) [2023-03-31 23:36:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20394 states to 20394 states and 31423 transitions. [2023-03-31 23:36:40,429 INFO L78 Accepts]: Start accepts. Automaton has 20394 states and 31423 transitions. Word has length 183 [2023-03-31 23:36:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:36:40,430 INFO L495 AbstractCegarLoop]: Abstraction has 20394 states and 31423 transitions. [2023-03-31 23:36:40,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 6 states have call successors, (38), 4 states have call predecessors, (38), 4 states have return successors, (31), 5 states have call predecessors, (31), 6 states have call successors, (31) [2023-03-31 23:36:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 20394 states and 31423 transitions. [2023-03-31 23:36:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-03-31 23:36:40,435 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:36:40,435 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:36:40,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-03-31 23:36:40,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:36:40,645 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:36:40,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:36:40,645 INFO L85 PathProgramCache]: Analyzing trace with hash 955667867, now seen corresponding path program 1 times [2023-03-31 23:36:40,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:36:40,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426664250] [2023-03-31 23:36:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:36:40,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms