/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:37:49,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:37:49,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:37:49,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:37:49,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:37:49,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:37:49,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:37:49,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:37:49,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:37:49,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:37:49,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:37:49,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:37:49,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:37:49,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:37:49,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:37:49,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:37:49,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:37:49,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:37:49,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:37:49,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:37:49,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:37:49,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:37:49,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:37:49,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:37:49,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:37:49,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:37:49,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:37:49,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:37:49,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:37:49,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:37:49,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:37:49,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:37:49,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:37:49,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:37:49,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:37:49,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:37:49,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:37:49,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:37:49,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:37:49,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:37:49,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:37:49,526 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:37:49,560 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:37:49,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:37:49,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:37:49,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:37:49,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:37:49,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:37:49,561 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:37:49,561 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:37:49,562 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:37:49,562 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:37:49,562 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:37:49,562 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:37:49,563 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:37:49,563 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:37:49,563 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:37:49,563 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:37:49,563 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:37:49,563 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:37:49,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:37:49,564 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:37:49,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:37:49,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:37:49,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:37:49,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:37:49,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:37:49,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:37:49,565 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:37:49,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:37:49,565 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:37:49,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:37:49,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:37:49,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:37:49,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:37:49,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:37:49,566 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:37:49,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:37:49,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:37:49,566 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:37:49,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:37:49,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:37:49,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:37:49,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:37:49,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:37:49,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:37:49,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:37:49,817 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:37:49,817 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:37:49,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2023-04-01 11:37:50,963 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:37:51,275 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:37:51,275 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2023-04-01 11:37:51,302 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be0e2e0ad/cf88d2ee137d45f5a50ad77ef9efbd76/FLAG2b4aac825 [2023-04-01 11:37:51,315 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be0e2e0ad/cf88d2ee137d45f5a50ad77ef9efbd76 [2023-04-01 11:37:51,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:37:51,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:37:51,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:37:51,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:37:51,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:37:51,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:37:51" (1/1) ... [2023-04-01 11:37:51,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c435994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:51, skipping insertion in model container [2023-04-01 11:37:51,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:37:51" (1/1) ... [2023-04-01 11:37:51,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:37:51,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:37:51,522 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_spec13_product32.cil.c[1546,1559] [2023-04-01 11:37:51,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:37:51,855 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:37:51,866 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_spec13_product32.cil.c[1546,1559] [2023-04-01 11:37:51,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:37:51,976 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:37:51,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:51 WrapperNode [2023-04-01 11:37:51,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:37:51,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:37:51,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:37:51,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:37:51,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:51" (1/1) ... [2023-04-01 11:37:51,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:51" (1/1) ... [2023-04-01 11:37:52,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:51" (1/1) ... [2023-04-01 11:37:52,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:51" (1/1) ... [2023-04-01 11:37:52,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:51" (1/1) ... [2023-04-01 11:37:52,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:51" (1/1) ... [2023-04-01 11:37:52,088 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:51" (1/1) ... [2023-04-01 11:37:52,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:51" (1/1) ... [2023-04-01 11:37:52,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:37:52,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:37:52,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:37:52,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:37:52,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:51" (1/1) ... [2023-04-01 11:37:52,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:37:52,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:37:52,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:37:52,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:37:52,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:37:52,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:37:52,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 11:37:52,218 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:37:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 11:37:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 11:37:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 11:37:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2023-04-01 11:37:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2023-04-01 11:37:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 11:37:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 11:37:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 11:37:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 11:37:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 11:37:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 11:37:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 11:37:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 11:37:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 11:37:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 11:37:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 11:37:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 11:37:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 11:37:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 11:37:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 11:37:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 11:37:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:37:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 11:37:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 11:37:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 11:37:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 11:37:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 11:37:52,222 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 11:37:52,224 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 11:37:52,224 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 11:37:52,224 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 11:37:52,224 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 11:37:52,224 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 11:37:52,225 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 11:37:52,225 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 11:37:52,225 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 11:37:52,225 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 11:37:52,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 11:37:52,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 11:37:52,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 11:37:52,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 11:37:52,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 11:37:52,227 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 11:37:52,227 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 11:37:52,227 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 11:37:52,227 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 11:37:52,227 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-01 11:37:52,227 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 11:37:52,227 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 11:37:52,227 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-01 11:37:52,228 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 11:37:52,228 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 11:37:52,228 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 11:37:52,228 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 11:37:52,228 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 11:37:52,229 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 11:37:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 11:37:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 11:37:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 11:37:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 11:37:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-01 11:37:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-01 11:37:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 11:37:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 11:37:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 11:37:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-01 11:37:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-01 11:37:52,231 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 11:37:52,231 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 11:37:52,231 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 11:37:52,231 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-04-01 11:37:52,231 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 11:37:52,231 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2023-04-01 11:37:52,231 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 11:37:52,231 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 11:37:52,232 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-01 11:37:52,232 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-01 11:37:52,232 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 11:37:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:37:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:37:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:37:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:37:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:37:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 11:37:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 11:37:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 11:37:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 11:37:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 11:37:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 11:37:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 11:37:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 11:37:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 11:37:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 11:37:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 11:37:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2023-04-01 11:37:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 11:37:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2023-04-01 11:37:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 11:37:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 11:37:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 11:37:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 11:37:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 11:37:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 11:37:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 11:37:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 11:37:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 11:37:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 11:37:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 11:37:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 11:37:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 11:37:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 11:37:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 11:37:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 11:37:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 11:37:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 11:37:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 11:37:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 11:37:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 11:37:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 11:37:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:37:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 11:37:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 11:37:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 11:37:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 11:37:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 11:37:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 11:37:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 11:37:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 11:37:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 11:37:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 11:37:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 11:37:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 11:37:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 11:37:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 11:37:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 11:37:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:37:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 11:37:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 11:37:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:37:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 11:37:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 11:37:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:37:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 11:37:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 11:37:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 11:37:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 11:37:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 11:37:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 11:37:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 11:37:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 11:37:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 11:37:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 11:37:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-01 11:37:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-01 11:37:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-01 11:37:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 11:37:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-01 11:37:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 11:37:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 11:37:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 11:37:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 11:37:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-01 11:37:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-01 11:37:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 11:37:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 11:37:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-01 11:37:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-01 11:37:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 11:37:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 11:37:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 11:37:52,245 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-04-01 11:37:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2023-04-01 11:37:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:37:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:37:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:37:52,599 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:37:52,602 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:37:54,032 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:37:54,952 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:37:54,952 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 11:37:54,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:37:54 BoogieIcfgContainer [2023-04-01 11:37:54,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:37:54,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:37:54,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:37:54,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:37:54,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:37:51" (1/3) ... [2023-04-01 11:37:54,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d48d31f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:37:54, skipping insertion in model container [2023-04-01 11:37:54,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:51" (2/3) ... [2023-04-01 11:37:54,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d48d31f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:37:54, skipping insertion in model container [2023-04-01 11:37:54,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:37:54" (3/3) ... [2023-04-01 11:37:54,962 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product32.cil.c [2023-04-01 11:37:54,978 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:37:54,978 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:37:55,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:37:55,065 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;@616b92ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:37:55,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:37:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 638 states, 381 states have (on average 1.4881889763779528) internal successors, (567), 407 states have internal predecessors, (567), 187 states have call successors, (187), 58 states have call predecessors, (187), 58 states have return successors, (187), 180 states have call predecessors, (187), 187 states have call successors, (187) [2023-04-01 11:37:55,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 11:37:55,099 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:37:55,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:37:55,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:37:55,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:37:55,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2140730822, now seen corresponding path program 1 times [2023-04-01 11:37:55,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:37:55,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620514860] [2023-04-01 11:37:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:37:55,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:37:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:37:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 11:37:55,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:37:55,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620514860] [2023-04-01 11:37:55,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620514860] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:37:55,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822733234] [2023-04-01 11:37:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:37:55,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:37:55,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:37:55,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:37:55,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:37:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:37:56,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 2527 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 11:37:56,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:37:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 11:37:56,421 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:37:56,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822733234] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:37:56,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:37:56,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2023-04-01 11:37:56,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064986202] [2023-04-01 11:37:56,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:37:56,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:37:56,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:37:56,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:37:56,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:37:56,481 INFO L87 Difference]: Start difference. First operand has 638 states, 381 states have (on average 1.4881889763779528) internal successors, (567), 407 states have internal predecessors, (567), 187 states have call successors, (187), 58 states have call predecessors, (187), 58 states have return successors, (187), 180 states have call predecessors, (187), 187 states have call successors, (187) Second operand has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-04-01 11:37:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:37:56,703 INFO L93 Difference]: Finished difference Result 1014 states and 1526 transitions. [2023-04-01 11:37:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:37:56,709 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 95 [2023-04-01 11:37:56,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:37:56,730 INFO L225 Difference]: With dead ends: 1014 [2023-04-01 11:37:56,730 INFO L226 Difference]: Without dead ends: 515 [2023-04-01 11:37:56,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:37:56,754 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:37:56,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 732 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:37:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-04-01 11:37:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2023-04-01 11:37:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 328 states have (on average 1.5030487804878048) internal successors, (493), 346 states have internal predecessors, (493), 136 states have call successors, (136), 55 states have call predecessors, (136), 50 states have return successors, (130), 126 states have call predecessors, (130), 130 states have call successors, (130) [2023-04-01 11:37:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 759 transitions. [2023-04-01 11:37:56,857 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 759 transitions. Word has length 95 [2023-04-01 11:37:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:37:56,858 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 759 transitions. [2023-04-01 11:37:56,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-04-01 11:37:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 759 transitions. [2023-04-01 11:37:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 11:37:56,863 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:37:56,866 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:37:56,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:37:57,076 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 [2023-04-01 11:37:57,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:37:57,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:37:57,077 INFO L85 PathProgramCache]: Analyzing trace with hash -959371110, now seen corresponding path program 1 times [2023-04-01 11:37:57,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:37:57,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202005453] [2023-04-01 11:37:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:37:57,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:37:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:37:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 11:37:57,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:37:57,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202005453] [2023-04-01 11:37:57,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202005453] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:37:57,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:37:57,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 11:37:57,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825714870] [2023-04-01 11:37:57,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:37:57,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:37:57,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:37:57,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:37:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:37:57,861 INFO L87 Difference]: Start difference. First operand 515 states and 759 transitions. 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, (25), 3 states have call predecessors, (25), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-04-01 11:37:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:37:58,268 INFO L93 Difference]: Finished difference Result 1464 states and 2202 transitions. [2023-04-01 11:37:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:37:58,269 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, (25), 3 states have call predecessors, (25), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 95 [2023-04-01 11:37:58,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:37:58,279 INFO L225 Difference]: With dead ends: 1464 [2023-04-01 11:37:58,279 INFO L226 Difference]: Without dead ends: 986 [2023-04-01 11:37:58,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:37:58,282 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 717 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:37:58,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 1434 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:37:58,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2023-04-01 11:37:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 940. [2023-04-01 11:37:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 624 states have (on average 1.5272435897435896) internal successors, (953), 651 states have internal predecessors, (953), 230 states have call successors, (230), 90 states have call predecessors, (230), 85 states have return successors, (232), 211 states have call predecessors, (232), 223 states have call successors, (232) [2023-04-01 11:37:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1415 transitions. [2023-04-01 11:37:58,368 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1415 transitions. Word has length 95 [2023-04-01 11:37:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:37:58,369 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1415 transitions. [2023-04-01 11:37:58,370 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, (25), 3 states have call predecessors, (25), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-04-01 11:37:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1415 transitions. [2023-04-01 11:37:58,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-01 11:37:58,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:37:58,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:37:58,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:37:58,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:37:58,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:37:58,376 INFO L85 PathProgramCache]: Analyzing trace with hash -707564692, now seen corresponding path program 1 times [2023-04-01 11:37:58,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:37:58,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099362215] [2023-04-01 11:37:58,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:37:58,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:37:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:37:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 11:37:59,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:37:59,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099362215] [2023-04-01 11:37:59,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099362215] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:37:59,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:37:59,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:37:59,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994308197] [2023-04-01 11:37:59,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:37:59,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:37:59,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:37:59,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:37:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:37:59,349 INFO L87 Difference]: Start difference. First operand 940 states and 1415 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-01 11:38:02,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:02,456 INFO L93 Difference]: Finished difference Result 2818 states and 4307 transitions. [2023-04-01 11:38:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:38:02,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) Word has length 143 [2023-04-01 11:38:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:02,473 INFO L225 Difference]: With dead ends: 2818 [2023-04-01 11:38:02,473 INFO L226 Difference]: Without dead ends: 1916 [2023-04-01 11:38:02,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:38:02,481 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 1406 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 4048 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 4577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 4048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:02,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1515 Valid, 598 Invalid, 4577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 4048 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 11:38:02,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2023-04-01 11:38:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1853. [2023-04-01 11:38:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1241 states have (on average 1.5302175664786462) internal successors, (1899), 1293 states have internal predecessors, (1899), 440 states have call successors, (440), 170 states have call predecessors, (440), 171 states have return successors, (484), 415 states have call predecessors, (484), 431 states have call successors, (484) [2023-04-01 11:38:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 2823 transitions. [2023-04-01 11:38:02,587 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 2823 transitions. Word has length 143 [2023-04-01 11:38:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:02,589 INFO L495 AbstractCegarLoop]: Abstraction has 1853 states and 2823 transitions. [2023-04-01 11:38:02,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-01 11:38:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 2823 transitions. [2023-04-01 11:38:02,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-01 11:38:02,598 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:02,598 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:38:02,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 11:38:02,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:02,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:02,600 INFO L85 PathProgramCache]: Analyzing trace with hash 813615855, now seen corresponding path program 1 times [2023-04-01 11:38:02,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:02,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254449149] [2023-04-01 11:38:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:02,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 11:38:03,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:03,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254449149] [2023-04-01 11:38:03,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254449149] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:03,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:38:03,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 11:38:03,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693196126] [2023-04-01 11:38:03,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:03,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 11:38:03,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:03,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 11:38:03,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-01 11:38:03,322 INFO L87 Difference]: Start difference. First operand 1853 states and 2823 transitions. Second operand has 10 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (35), 4 states have call predecessors, (35), 4 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2023-04-01 11:38:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:04,439 INFO L93 Difference]: Finished difference Result 4067 states and 6215 transitions. [2023-04-01 11:38:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 11:38:04,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (35), 4 states have call predecessors, (35), 4 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) Word has length 146 [2023-04-01 11:38:04,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:04,459 INFO L225 Difference]: With dead ends: 4067 [2023-04-01 11:38:04,460 INFO L226 Difference]: Without dead ends: 2251 [2023-04-01 11:38:04,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:38:04,473 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 538 mSDsluCounter, 5408 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 6268 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:04,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 6268 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 11:38:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2023-04-01 11:38:04,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 2234. [2023-04-01 11:38:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 1491 states have (on average 1.5023474178403755) internal successors, (2240), 1540 states have internal predecessors, (2240), 519 states have call successors, (519), 220 states have call predecessors, (519), 223 states have return successors, (604), 500 states have call predecessors, (604), 508 states have call successors, (604) [2023-04-01 11:38:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 3363 transitions. [2023-04-01 11:38:04,600 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 3363 transitions. Word has length 146 [2023-04-01 11:38:04,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:04,601 INFO L495 AbstractCegarLoop]: Abstraction has 2234 states and 3363 transitions. [2023-04-01 11:38:04,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (35), 4 states have call predecessors, (35), 4 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2023-04-01 11:38:04,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 3363 transitions. [2023-04-01 11:38:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 11:38:04,605 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:04,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:38:04,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 11:38:04,606 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:04,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:04,606 INFO L85 PathProgramCache]: Analyzing trace with hash 760682338, now seen corresponding path program 1 times [2023-04-01 11:38:04,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:04,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230230481] [2023-04-01 11:38:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:04,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 11:38:04,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:04,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230230481] [2023-04-01 11:38:04,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230230481] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:04,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300419040] [2023-04-01 11:38:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:04,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:04,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:04,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:38:04,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:38:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:05,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 11:38:05,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 11:38:05,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:05,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300419040] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:05,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:05,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-04-01 11:38:05,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867886269] [2023-04-01 11:38:05,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:05,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:38:05,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:05,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:38:05,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:38:05,477 INFO L87 Difference]: Start difference. First operand 2234 states and 3363 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:05,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:05,701 INFO L93 Difference]: Finished difference Result 4467 states and 6847 transitions. [2023-04-01 11:38:05,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:38:05,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 147 [2023-04-01 11:38:05,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:05,714 INFO L225 Difference]: With dead ends: 4467 [2023-04-01 11:38:05,715 INFO L226 Difference]: Without dead ends: 2270 [2023-04-01 11:38:05,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:38:05,725 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 85 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:05,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 2049 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:38:05,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2023-04-01 11:38:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2270. [2023-04-01 11:38:05,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 1521 states have (on average 1.4963839579224194) internal successors, (2276), 1570 states have internal predecessors, (2276), 519 states have call successors, (519), 226 states have call predecessors, (519), 229 states have return successors, (604), 500 states have call predecessors, (604), 508 states have call successors, (604) [2023-04-01 11:38:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 3399 transitions. [2023-04-01 11:38:05,835 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 3399 transitions. Word has length 147 [2023-04-01 11:38:05,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:05,835 INFO L495 AbstractCegarLoop]: Abstraction has 2270 states and 3399 transitions. [2023-04-01 11:38:05,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:05,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 3399 transitions. [2023-04-01 11:38:05,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 11:38:05,839 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:05,839 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] [2023-04-01 11:38:05,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 11:38:06,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:06,050 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:06,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:06,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1553611289, now seen corresponding path program 1 times [2023-04-01 11:38:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:06,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460699254] [2023-04-01 11:38:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:06,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 11:38:06,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:06,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460699254] [2023-04-01 11:38:06,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460699254] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:06,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139382955] [2023-04-01 11:38:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:06,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:06,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:06,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:38:06,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:38:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:06,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 2892 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 11:38:06,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 11:38:06,973 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:06,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139382955] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:06,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:06,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-01 11:38:06,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551685433] [2023-04-01 11:38:06,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:06,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:38:06,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:06,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:38:06,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:38:06,975 INFO L87 Difference]: Start difference. First operand 2270 states and 3399 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:07,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:07,179 INFO L93 Difference]: Finished difference Result 4521 states and 6877 transitions. [2023-04-01 11:38:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:38:07,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 149 [2023-04-01 11:38:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:07,196 INFO L225 Difference]: With dead ends: 4521 [2023-04-01 11:38:07,196 INFO L226 Difference]: Without dead ends: 2264 [2023-04-01 11:38:07,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:38:07,207 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 91 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:07,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 2045 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:38:07,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2023-04-01 11:38:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2264. [2023-04-01 11:38:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 1515 states have (on average 1.4864686468646864) internal successors, (2252), 1564 states have internal predecessors, (2252), 519 states have call successors, (519), 226 states have call predecessors, (519), 229 states have return successors, (604), 500 states have call predecessors, (604), 508 states have call successors, (604) [2023-04-01 11:38:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 3375 transitions. [2023-04-01 11:38:07,324 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 3375 transitions. Word has length 149 [2023-04-01 11:38:07,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:07,325 INFO L495 AbstractCegarLoop]: Abstraction has 2264 states and 3375 transitions. [2023-04-01 11:38:07,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 3375 transitions. [2023-04-01 11:38:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-01 11:38:07,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:07,329 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 11:38:07,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 11:38:07,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:07,541 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:07,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:07,541 INFO L85 PathProgramCache]: Analyzing trace with hash -254501127, now seen corresponding path program 1 times [2023-04-01 11:38:07,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:07,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739537094] [2023-04-01 11:38:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:07,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 11:38:07,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:07,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739537094] [2023-04-01 11:38:07,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739537094] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:07,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115389675] [2023-04-01 11:38:07,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:07,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:07,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:07,820 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:38:07,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:38:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:08,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 2896 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 11:38:08,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 11:38:08,450 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:08,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115389675] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:08,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:08,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 11:38:08,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042225285] [2023-04-01 11:38:08,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:08,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:38:08,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:08,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:38:08,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:38:08,453 INFO L87 Difference]: Start difference. First operand 2264 states and 3375 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-01 11:38:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:09,449 INFO L93 Difference]: Finished difference Result 5741 states and 8919 transitions. [2023-04-01 11:38:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:38:09,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 150 [2023-04-01 11:38:09,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:09,473 INFO L225 Difference]: With dead ends: 5741 [2023-04-01 11:38:09,474 INFO L226 Difference]: Without dead ends: 3514 [2023-04-01 11:38:09,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:38:09,487 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 740 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 2132 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:09,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 2132 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 11:38:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2023-04-01 11:38:09,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 3466. [2023-04-01 11:38:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3466 states, 2323 states have (on average 1.4373654756780025) internal successors, (3339), 2397 states have internal predecessors, (3339), 780 states have call successors, (780), 354 states have call predecessors, (780), 362 states have return successors, (1080), 754 states have call predecessors, (1080), 765 states have call successors, (1080) [2023-04-01 11:38:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 5199 transitions. [2023-04-01 11:38:09,746 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 5199 transitions. Word has length 150 [2023-04-01 11:38:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:09,749 INFO L495 AbstractCegarLoop]: Abstraction has 3466 states and 5199 transitions. [2023-04-01 11:38:09,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-01 11:38:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 5199 transitions. [2023-04-01 11:38:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-01 11:38:09,753 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:09,753 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 11:38:09,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 11:38:09,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:09,964 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:09,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:09,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1896921819, now seen corresponding path program 1 times [2023-04-01 11:38:09,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:09,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825379128] [2023-04-01 11:38:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:09,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 11:38:10,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:10,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825379128] [2023-04-01 11:38:10,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825379128] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:10,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757662201] [2023-04-01 11:38:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:10,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:10,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:10,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:38:10,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 11:38:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:11,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 2897 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 11:38:11,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 11:38:11,278 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:11,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757662201] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:11,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:11,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-04-01 11:38:11,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633204020] [2023-04-01 11:38:11,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:11,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:38:11,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:11,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:38:11,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:38:11,280 INFO L87 Difference]: Start difference. First operand 3466 states and 5199 transitions. Second operand has 7 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (35), 4 states have call predecessors, (35), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2023-04-01 11:38:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:12,289 INFO L93 Difference]: Finished difference Result 7857 states and 12202 transitions. [2023-04-01 11:38:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:38:12,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (35), 4 states have call predecessors, (35), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 151 [2023-04-01 11:38:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:12,319 INFO L225 Difference]: With dead ends: 7857 [2023-04-01 11:38:12,319 INFO L226 Difference]: Without dead ends: 4428 [2023-04-01 11:38:12,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-04-01 11:38:12,336 INFO L413 NwaCegarLoop]: 913 mSDtfsCounter, 1447 mSDsluCounter, 2172 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:12,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1450 Valid, 3085 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 11:38:12,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4428 states. [2023-04-01 11:38:12,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4428 to 4384. [2023-04-01 11:38:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 2972 states have (on average 1.4219380888290714) internal successors, (4226), 3048 states have internal predecessors, (4226), 917 states have call successors, (917), 470 states have call predecessors, (917), 494 states have return successors, (1713), 905 states have call predecessors, (1713), 894 states have call successors, (1713) [2023-04-01 11:38:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 6856 transitions. [2023-04-01 11:38:12,684 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 6856 transitions. Word has length 151 [2023-04-01 11:38:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:12,684 INFO L495 AbstractCegarLoop]: Abstraction has 4384 states and 6856 transitions. [2023-04-01 11:38:12,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (35), 4 states have call predecessors, (35), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2023-04-01 11:38:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 6856 transitions. [2023-04-01 11:38:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-01 11:38:12,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:12,689 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] [2023-04-01 11:38:12,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 11:38:12,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:12,902 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:12,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:12,903 INFO L85 PathProgramCache]: Analyzing trace with hash -168174084, now seen corresponding path program 1 times [2023-04-01 11:38:12,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:12,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772108323] [2023-04-01 11:38:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:12,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:38:13,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:13,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772108323] [2023-04-01 11:38:13,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772108323] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:13,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509264372] [2023-04-01 11:38:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:13,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:13,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:13,141 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) [2023-04-01 11:38:13,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:38:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:13,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 11:38:13,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 11:38:13,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:13,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509264372] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:13,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:13,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 11:38:13,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253628934] [2023-04-01 11:38:13,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:13,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:38:13,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:13,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:38:13,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:38:13,691 INFO L87 Difference]: Start difference. First operand 4384 states and 6856 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:14,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:14,010 INFO L93 Difference]: Finished difference Result 8824 states and 14263 transitions. [2023-04-01 11:38:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:38:14,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 151 [2023-04-01 11:38:14,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:14,040 INFO L225 Difference]: With dead ends: 8824 [2023-04-01 11:38:14,040 INFO L226 Difference]: Without dead ends: 4490 [2023-04-01 11:38:14,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:38:14,112 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 2 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:14,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2873 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:38:14,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4490 states. [2023-04-01 11:38:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4490 to 4424. [2023-04-01 11:38:14,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 3002 states have (on average 1.4177215189873418) internal successors, (4256), 3078 states have internal predecessors, (4256), 917 states have call successors, (917), 470 states have call predecessors, (917), 504 states have return successors, (1723), 915 states have call predecessors, (1723), 894 states have call successors, (1723) [2023-04-01 11:38:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 6896 transitions. [2023-04-01 11:38:14,376 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 6896 transitions. Word has length 151 [2023-04-01 11:38:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:14,376 INFO L495 AbstractCegarLoop]: Abstraction has 4424 states and 6896 transitions. [2023-04-01 11:38:14,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 6896 transitions. [2023-04-01 11:38:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 11:38:14,380 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:14,380 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] [2023-04-01 11:38:14,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 11:38:14,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:14,591 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:14,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:14,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1356324397, now seen corresponding path program 1 times [2023-04-01 11:38:14,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:14,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465529927] [2023-04-01 11:38:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:14,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:38:15,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:15,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465529927] [2023-04-01 11:38:15,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465529927] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:15,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438043995] [2023-04-01 11:38:15,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:15,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:15,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:15,068 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) [2023-04-01 11:38:15,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:38:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:15,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 2903 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 11:38:15,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 11:38:15,606 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:15,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438043995] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:15,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:15,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-01 11:38:15,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018208188] [2023-04-01 11:38:15,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:15,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:38:15,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:15,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:38:15,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:38:15,608 INFO L87 Difference]: Start difference. First operand 4424 states and 6896 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:16,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:16,008 INFO L93 Difference]: Finished difference Result 9031 states and 14595 transitions. [2023-04-01 11:38:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 11:38:16,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 153 [2023-04-01 11:38:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:16,048 INFO L225 Difference]: With dead ends: 9031 [2023-04-01 11:38:16,049 INFO L226 Difference]: Without dead ends: 4658 [2023-04-01 11:38:16,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:38:16,077 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 19 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:16,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 2007 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:38:16,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4658 states. [2023-04-01 11:38:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4658 to 4604. [2023-04-01 11:38:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4604 states, 3182 states have (on average 1.4299182903834067) internal successors, (4550), 3258 states have internal predecessors, (4550), 917 states have call successors, (917), 470 states have call predecessors, (917), 504 states have return successors, (1723), 915 states have call predecessors, (1723), 894 states have call successors, (1723) [2023-04-01 11:38:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 7190 transitions. [2023-04-01 11:38:16,363 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 7190 transitions. Word has length 153 [2023-04-01 11:38:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:16,363 INFO L495 AbstractCegarLoop]: Abstraction has 4604 states and 7190 transitions. [2023-04-01 11:38:16,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 7190 transitions. [2023-04-01 11:38:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-01 11:38:16,367 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:16,367 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] [2023-04-01 11:38:16,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 11:38:16,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:16,577 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:16,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:16,578 INFO L85 PathProgramCache]: Analyzing trace with hash -396167703, now seen corresponding path program 1 times [2023-04-01 11:38:16,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:16,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121849162] [2023-04-01 11:38:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:16,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:38:16,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:16,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121849162] [2023-04-01 11:38:16,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121849162] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:16,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097066758] [2023-04-01 11:38:16,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:16,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:16,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:16,989 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) [2023-04-01 11:38:16,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 11:38:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:17,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 2905 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 11:38:17,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 11:38:17,570 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:17,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097066758] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:17,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:17,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 11:38:17,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641921512] [2023-04-01 11:38:17,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:17,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:38:17,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:17,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:38:17,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:38:17,572 INFO L87 Difference]: Start difference. First operand 4604 states and 7190 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-01 11:38:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:18,637 INFO L93 Difference]: Finished difference Result 11535 states and 19598 transitions. [2023-04-01 11:38:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:38:18,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 155 [2023-04-01 11:38:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:18,683 INFO L225 Difference]: With dead ends: 11535 [2023-04-01 11:38:18,683 INFO L226 Difference]: Without dead ends: 7906 [2023-04-01 11:38:18,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:38:18,703 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 749 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:18,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 2166 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 11:38:18,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7906 states. [2023-04-01 11:38:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7906 to 7757. [2023-04-01 11:38:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7757 states, 5379 states have (on average 1.4244283324037925) internal successors, (7662), 5502 states have internal predecessors, (7662), 1524 states have call successors, (1524), 792 states have call predecessors, (1524), 853 states have return successors, (3621), 1528 states have call predecessors, (3621), 1487 states have call successors, (3621) [2023-04-01 11:38:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7757 states to 7757 states and 12807 transitions. [2023-04-01 11:38:19,198 INFO L78 Accepts]: Start accepts. Automaton has 7757 states and 12807 transitions. Word has length 155 [2023-04-01 11:38:19,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:19,198 INFO L495 AbstractCegarLoop]: Abstraction has 7757 states and 12807 transitions. [2023-04-01 11:38:19,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-01 11:38:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 7757 states and 12807 transitions. [2023-04-01 11:38:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-01 11:38:19,202 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:19,203 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] [2023-04-01 11:38:19,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 11:38:19,413 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,SelfDestructingSolverStorable10 [2023-04-01 11:38:19,414 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:19,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:19,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1633494483, now seen corresponding path program 1 times [2023-04-01 11:38:19,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:19,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751451630] [2023-04-01 11:38:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:19,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:38:19,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:19,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751451630] [2023-04-01 11:38:19,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751451630] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:19,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150094819] [2023-04-01 11:38:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:19,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:19,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:19,634 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) [2023-04-01 11:38:19,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 11:38:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:20,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 2904 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 11:38:20,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 11:38:20,152 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:20,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150094819] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:20,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:20,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-04-01 11:38:20,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521952932] [2023-04-01 11:38:20,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:20,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:38:20,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:20,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:38:20,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:38:20,154 INFO L87 Difference]: Start difference. First operand 7757 states and 12807 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:20,524 INFO L93 Difference]: Finished difference Result 15675 states and 27294 transitions. [2023-04-01 11:38:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 11:38:20,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 155 [2023-04-01 11:38:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:20,572 INFO L225 Difference]: With dead ends: 15675 [2023-04-01 11:38:20,572 INFO L226 Difference]: Without dead ends: 7969 [2023-04-01 11:38:20,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:38:20,612 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 4 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2131 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:20,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2131 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:38:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7969 states. [2023-04-01 11:38:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7969 to 7789. [2023-04-01 11:38:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7789 states, 5411 states have (on average 1.410829791166143) internal successors, (7634), 5534 states have internal predecessors, (7634), 1524 states have call successors, (1524), 792 states have call predecessors, (1524), 853 states have return successors, (3621), 1528 states have call predecessors, (3621), 1487 states have call successors, (3621) [2023-04-01 11:38:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7789 states to 7789 states and 12779 transitions. [2023-04-01 11:38:21,202 INFO L78 Accepts]: Start accepts. Automaton has 7789 states and 12779 transitions. Word has length 155 [2023-04-01 11:38:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:21,202 INFO L495 AbstractCegarLoop]: Abstraction has 7789 states and 12779 transitions. [2023-04-01 11:38:21,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 11:38:21,203 INFO L276 IsEmpty]: Start isEmpty. Operand 7789 states and 12779 transitions. [2023-04-01 11:38:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-04-01 11:38:21,206 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:21,206 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] [2023-04-01 11:38:21,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 11:38:21,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:21,416 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:21,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:21,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1216712392, now seen corresponding path program 1 times [2023-04-01 11:38:21,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:21,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772774749] [2023-04-01 11:38:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:21,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:38:21,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:21,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772774749] [2023-04-01 11:38:21,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772774749] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:21,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203841297] [2023-04-01 11:38:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:21,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:21,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:21,827 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) [2023-04-01 11:38:21,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 11:38:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:22,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 2906 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 11:38:22,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 11:38:22,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:22,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203841297] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:22,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:22,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 11:38:22,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814181092] [2023-04-01 11:38:22,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:22,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:38:22,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:22,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:38:22,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:38:22,408 INFO L87 Difference]: Start difference. First operand 7789 states and 12779 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-01 11:38:23,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:23,561 INFO L93 Difference]: Finished difference Result 17831 states and 31331 transitions. [2023-04-01 11:38:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:38:23,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 156 [2023-04-01 11:38:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:23,622 INFO L225 Difference]: With dead ends: 17831 [2023-04-01 11:38:23,622 INFO L226 Difference]: Without dead ends: 11067 [2023-04-01 11:38:23,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:38:23,662 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 768 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 2171 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:23,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 2171 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 11:38:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11067 states. [2023-04-01 11:38:24,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11067 to 10935. [2023-04-01 11:38:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10935 states, 7601 states have (on average 1.408367320089462) internal successors, (10705), 7771 states have internal predecessors, (10705), 2131 states have call successors, (2131), 1114 states have call predecessors, (2131), 1202 states have return successors, (6037), 2141 states have call predecessors, (6037), 2080 states have call successors, (6037) [2023-04-01 11:38:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10935 states to 10935 states and 18873 transitions. [2023-04-01 11:38:24,432 INFO L78 Accepts]: Start accepts. Automaton has 10935 states and 18873 transitions. Word has length 156 [2023-04-01 11:38:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:24,433 INFO L495 AbstractCegarLoop]: Abstraction has 10935 states and 18873 transitions. [2023-04-01 11:38:24,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-01 11:38:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 10935 states and 18873 transitions. [2023-04-01 11:38:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 11:38:24,438 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:24,438 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] [2023-04-01 11:38:24,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 11:38:24,648 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,SelfDestructingSolverStorable12 [2023-04-01 11:38:24,649 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:24,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:24,649 INFO L85 PathProgramCache]: Analyzing trace with hash 210479615, now seen corresponding path program 1 times [2023-04-01 11:38:24,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:24,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021247420] [2023-04-01 11:38:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:24,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:38:25,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:25,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021247420] [2023-04-01 11:38:25,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021247420] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:25,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481774459] [2023-04-01 11:38:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:25,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:25,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:25,095 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) [2023-04-01 11:38:25,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 11:38:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:25,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 2907 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 11:38:25,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 11:38:25,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:38:25,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481774459] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:38:25,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:38:25,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 11:38:25,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285508658] [2023-04-01 11:38:25,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:38:25,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:38:25,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:38:25,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:38:25,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:38:25,637 INFO L87 Difference]: Start difference. First operand 10935 states and 18873 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-01 11:38:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:38:26,952 INFO L93 Difference]: Finished difference Result 23583 states and 42644 transitions. [2023-04-01 11:38:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:38:26,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 157 [2023-04-01 11:38:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:38:27,039 INFO L225 Difference]: With dead ends: 23583 [2023-04-01 11:38:27,039 INFO L226 Difference]: Without dead ends: 13719 [2023-04-01 11:38:27,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:38:27,111 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 789 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 2173 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:38:27,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 2173 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 11:38:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13719 states. [2023-04-01 11:38:28,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13719 to 13270. [2023-04-01 11:38:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13270 states, 9133 states have (on average 1.4051242746085624) internal successors, (12833), 9343 states have internal predecessors, (12833), 2658 states have call successors, (2658), 1383 states have call predecessors, (2658), 1478 states have return successors, (7991), 2661 states have call predecessors, (7991), 2597 states have call successors, (7991) [2023-04-01 11:38:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13270 states to 13270 states and 23482 transitions. [2023-04-01 11:38:28,162 INFO L78 Accepts]: Start accepts. Automaton has 13270 states and 23482 transitions. Word has length 157 [2023-04-01 11:38:28,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:38:28,162 INFO L495 AbstractCegarLoop]: Abstraction has 13270 states and 23482 transitions. [2023-04-01 11:38:28,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-01 11:38:28,162 INFO L276 IsEmpty]: Start isEmpty. Operand 13270 states and 23482 transitions. [2023-04-01 11:38:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 11:38:28,167 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:38:28,167 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] [2023-04-01 11:38:28,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 11:38:28,379 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,SelfDestructingSolverStorable13 [2023-04-01 11:38:28,380 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:38:28,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:38:28,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1184431123, now seen corresponding path program 1 times [2023-04-01 11:38:28,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:38:28,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411436063] [2023-04-01 11:38:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:28,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:38:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 11:38:28,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:38:28,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411436063] [2023-04-01 11:38:28,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411436063] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:38:28,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569630842] [2023-04-01 11:38:28,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:38:28,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:38:28,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:38:28,576 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) [2023-04-01 11:38:28,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 11:38:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:38:29,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 2905 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 11:38:29,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:38:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 11:38:29,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:38:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:38:29,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569630842] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:38:29,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [468570319] [2023-04-01 11:38:29,534 INFO L159 IcfgInterpreter]: Started Sifa with 134 locations of interest [2023-04-01 11:38:29,535 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:38:29,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:38:29,543 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:38:29,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs