/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 OctagonDomain -i ../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:45:48,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:45:48,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:45:48,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:45:48,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:45:48,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:45:48,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:45:48,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:45:48,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:45:48,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:45:48,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:45:48,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:45:48,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:45:48,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:45:48,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:45:48,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:45:48,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:45:48,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:45:48,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:45:48,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:45:48,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:45:48,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:45:48,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:45:48,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:45:48,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:45:48,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:45:48,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:45:48,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:45:48,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:45:48,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:45:48,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:45:48,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:45:48,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:45:48,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:45:48,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:45:48,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:45:48,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:45:48,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:45:48,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:45:48,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:45:48,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:45:48,329 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 [2023-04-02 23:45:48,359 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:45:48,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:45:48,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:45:48,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:45:48,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:45:48,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:45:48,361 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:45:48,361 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:45:48,361 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:45:48,361 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:45:48,361 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:45:48,361 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:45:48,361 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:45:48,361 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:45:48,361 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:45:48,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:45:48,362 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:45:48,362 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:45:48,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:45:48,362 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:45:48,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:45:48,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:45:48,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:45:48,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:45:48,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:45:48,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:45:48,363 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:45:48,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:45:48,363 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:45:48,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:45:48,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:45:48,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:45:48,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:45:48,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:45:48,363 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:45:48,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:45:48,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:45:48,364 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:45:48,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:45:48,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:45:48,364 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:45:48,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:45:48,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:45:48,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:45:48,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:45:48,573 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:45:48,574 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:45:48,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2023-04-02 23:45:49,607 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:45:49,825 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:45:49,825 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2023-04-02 23:45:49,840 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b879911/aa2faf50a009418b9650f1357f020951/FLAG909bb1c18 [2023-04-02 23:45:49,850 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b879911/aa2faf50a009418b9650f1357f020951 [2023-04-02 23:45:49,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:45:49,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:45:49,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:45:49,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:45:49,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:45:49,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:45:49" (1/1) ... [2023-04-02 23:45:49,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@244b31e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:45:49, skipping insertion in model container [2023-04-02 23:45:49,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:45:49" (1/1) ... [2023-04-02 23:45:49,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:45:49,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:45:50,069 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2023-04-02 23:45:50,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:45:50,243 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:45:50,278 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2023-04-02 23:45:50,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:45:50,360 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:45:50,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:45:50 WrapperNode [2023-04-02 23:45:50,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:45:50,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:45:50,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:45:50,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:45:50,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:45:50" (1/1) ... [2023-04-02 23:45:50,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:45:50" (1/1) ... [2023-04-02 23:45:50,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:45:50" (1/1) ... [2023-04-02 23:45:50,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:45:50" (1/1) ... [2023-04-02 23:45:50,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:45:50" (1/1) ... [2023-04-02 23:45:50,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:45:50" (1/1) ... [2023-04-02 23:45:50,469 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:45:50" (1/1) ... [2023-04-02 23:45:50,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:45:50" (1/1) ... [2023-04-02 23:45:50,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:45:50,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:45:50,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:45:50,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:45:50,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:45:50" (1/1) ... [2023-04-02 23:45:50,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:45:50,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:45:50,524 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) [2023-04-02 23:45:50,530 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 [2023-04-02 23:45:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:45:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:45:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:45:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:45:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:45:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:45:50,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:45:50,557 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:45:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:45:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:45:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:45:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:45:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:45:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:45:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:45:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-02 23:45:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:45:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:45:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:45:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:45:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-02 23:45:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:45:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:45:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:45:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:45:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:45:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:45:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-02 23:45:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-02 23:45:50,560 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:45:50,560 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:45:50,560 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:45:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:45:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:45:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:45:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2023-04-02 23:45:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2023-04-02 23:45:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2023-04-02 23:45:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2023-04-02 23:45:50,561 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:45:50,562 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:45:50,562 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:45:50,562 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:45:50,562 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:45:50,562 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:45:50,563 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:45:50,563 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:45:50,563 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:45:50,563 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:45:50,563 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:45:50,563 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:45:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:45:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:45:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:45:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:45:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:45:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:45:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:45:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:45:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:45:50,564 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:45:50,565 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:45:50,565 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:45:50,565 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:45:50,565 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:45:50,565 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:45:50,565 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:45:50,565 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:45:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:45:50,565 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:45:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:45:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:45:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:45:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:45:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:45:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:45:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:45:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:45:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:45:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:45:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:45:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:45:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:45:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:45:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:45:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:45:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:45:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:45:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:45:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:45:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:45:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:45:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:45:50,569 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:45:50,570 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:45:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:45:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:45:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-02 23:45:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-02 23:45:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:45:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:45:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-02 23:45:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:45:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:45:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:45:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:45:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:45:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:45:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:45:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:45:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:45:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:45:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:45:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:45:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:45:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:45:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:45:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:45:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:45:50,817 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:45:50,819 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:45:51,824 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:45:52,417 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:45:52,417 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:45:52,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:45:52 BoogieIcfgContainer [2023-04-02 23:45:52,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:45:52,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:45:52,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:45:52,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:45:52,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:45:49" (1/3) ... [2023-04-02 23:45:52,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7053703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:45:52, skipping insertion in model container [2023-04-02 23:45:52,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:45:50" (2/3) ... [2023-04-02 23:45:52,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7053703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:45:52, skipping insertion in model container [2023-04-02 23:45:52,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:45:52" (3/3) ... [2023-04-02 23:45:52,429 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product31.cil.c [2023-04-02 23:45:52,442 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:45:52,442 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:45:52,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:45:52,503 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;@6464b369, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:45:52,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:45:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 602 states, 351 states have (on average 1.4729344729344729) internal successors, (517), 378 states have internal predecessors, (517), 183 states have call successors, (183), 55 states have call predecessors, (183), 55 states have return successors, (183), 174 states have call predecessors, (183), 183 states have call successors, (183) [2023-04-02 23:45:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-02 23:45:52,560 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:45:52,561 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:45:52,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:45:52,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:45:52,567 INFO L85 PathProgramCache]: Analyzing trace with hash -429114000, now seen corresponding path program 1 times [2023-04-02 23:45:52,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:45:52,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618521097] [2023-04-02 23:45:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:45:52,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:45:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:45:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 23:45:53,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:45:53,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618521097] [2023-04-02 23:45:53,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618521097] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:45:53,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:45:53,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:45:53,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778984436] [2023-04-02 23:45:53,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:45:53,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:45:53,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:45:53,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:45:53,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:45:53,086 INFO L87 Difference]: Start difference. First operand has 602 states, 351 states have (on average 1.4729344729344729) internal successors, (517), 378 states have internal predecessors, (517), 183 states have call successors, (183), 55 states have call predecessors, (183), 55 states have return successors, (183), 174 states have call predecessors, (183), 183 states have call successors, (183) Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2023-04-02 23:45:53,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:45:53,236 INFO L93 Difference]: Finished difference Result 511 states and 751 transitions. [2023-04-02 23:45:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:45:53,238 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 135 [2023-04-02 23:45:53,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:45:53,255 INFO L225 Difference]: With dead ends: 511 [2023-04-02 23:45:53,255 INFO L226 Difference]: Without dead ends: 477 [2023-04-02 23:45:53,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:45:53,261 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:45:53,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 669 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:45:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-04-02 23:45:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 477. [2023-04-02 23:45:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 298 states have (on average 1.5033557046979866) internal successors, (448), 317 states have internal predecessors, (448), 130 states have call successors, (130), 52 states have call predecessors, (130), 48 states have return successors, (122), 119 states have call predecessors, (122), 122 states have call successors, (122) [2023-04-02 23:45:53,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 700 transitions. [2023-04-02 23:45:53,345 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 700 transitions. Word has length 135 [2023-04-02 23:45:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:45:53,348 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 700 transitions. [2023-04-02 23:45:53,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2023-04-02 23:45:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 700 transitions. [2023-04-02 23:45:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-02 23:45:53,356 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:45:53,356 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:45:53,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:45:53,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:45:53,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:45:53,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1346058678, now seen corresponding path program 1 times [2023-04-02 23:45:53,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:45:53,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346028661] [2023-04-02 23:45:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:45:53,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:45:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:45:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 23:45:53,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:45:53,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346028661] [2023-04-02 23:45:53,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346028661] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:45:53,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:45:53,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:45:53,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138598098] [2023-04-02 23:45:53,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:45:53,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:45:53,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:45:53,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:45:53,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:45:53,988 INFO L87 Difference]: Start difference. First operand 477 states and 700 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-02 23:45:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:45:56,196 INFO L93 Difference]: Finished difference Result 1336 states and 2011 transitions. [2023-04-02 23:45:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:45:56,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) Word has length 136 [2023-04-02 23:45:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:45:56,204 INFO L225 Difference]: With dead ends: 1336 [2023-04-02 23:45:56,205 INFO L226 Difference]: Without dead ends: 912 [2023-04-02 23:45:56,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:45:56,214 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 1295 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 3525 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 4016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 3525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:45:56,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1391 Valid, 504 Invalid, 4016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 3525 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-02 23:45:56,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2023-04-02 23:45:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 887. [2023-04-02 23:45:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 568 states have (on average 1.5211267605633803) internal successors, (864), 601 states have internal predecessors, (864), 234 states have call successors, (234), 87 states have call predecessors, (234), 84 states have return successors, (232), 222 states have call predecessors, (232), 226 states have call successors, (232) [2023-04-02 23:45:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1330 transitions. [2023-04-02 23:45:56,268 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1330 transitions. Word has length 136 [2023-04-02 23:45:56,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:45:56,269 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1330 transitions. [2023-04-02 23:45:56,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-02 23:45:56,269 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1330 transitions. [2023-04-02 23:45:56,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-02 23:45:56,274 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:45:56,274 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:45:56,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:45:56,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:45:56,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:45:56,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1864466842, now seen corresponding path program 1 times [2023-04-02 23:45:56,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:45:56,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671758329] [2023-04-02 23:45:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:45:56,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:45:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:45:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 23:45:56,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:45:56,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671758329] [2023-04-02 23:45:56,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671758329] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:45:56,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:45:56,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:45:56,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372815102] [2023-04-02 23:45:56,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:45:56,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:45:56,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:45:56,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:45:56,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:45:56,633 INFO L87 Difference]: Start difference. First operand 887 states and 1330 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:45:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:45:57,102 INFO L93 Difference]: Finished difference Result 926 states and 1386 transitions. [2023-04-02 23:45:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:45:57,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) Word has length 140 [2023-04-02 23:45:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:45:57,108 INFO L225 Difference]: With dead ends: 926 [2023-04-02 23:45:57,108 INFO L226 Difference]: Without dead ends: 909 [2023-04-02 23:45:57,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:45:57,114 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 708 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2126 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:45:57,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 2126 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:45:57,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2023-04-02 23:45:57,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 891. [2023-04-02 23:45:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 572 states have (on average 1.5174825174825175) internal successors, (868), 605 states have internal predecessors, (868), 234 states have call successors, (234), 87 states have call predecessors, (234), 84 states have return successors, (232), 222 states have call predecessors, (232), 226 states have call successors, (232) [2023-04-02 23:45:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1334 transitions. [2023-04-02 23:45:57,156 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1334 transitions. Word has length 140 [2023-04-02 23:45:57,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:45:57,157 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1334 transitions. [2023-04-02 23:45:57,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:45:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1334 transitions. [2023-04-02 23:45:57,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-02 23:45:57,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:45:57,161 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:45:57,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:45:57,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:45:57,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:45:57,161 INFO L85 PathProgramCache]: Analyzing trace with hash -23054261, now seen corresponding path program 1 times [2023-04-02 23:45:57,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:45:57,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668644006] [2023-04-02 23:45:57,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:45:57,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:45:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:45:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 23:45:57,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:45:57,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668644006] [2023-04-02 23:45:57,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668644006] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:45:57,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:45:57,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:45:57,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456043877] [2023-04-02 23:45:57,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:45:57,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:45:57,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:45:57,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:45:57,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:45:57,541 INFO L87 Difference]: Start difference. First operand 891 states and 1334 transitions. Second operand has 8 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 1 states have call successors, (29) [2023-04-02 23:45:57,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:45:57,713 INFO L93 Difference]: Finished difference Result 912 states and 1360 transitions. [2023-04-02 23:45:57,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:45:57,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 1 states have call successors, (29) Word has length 145 [2023-04-02 23:45:57,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:45:57,717 INFO L225 Difference]: With dead ends: 912 [2023-04-02 23:45:57,718 INFO L226 Difference]: Without dead ends: 895 [2023-04-02 23:45:57,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:45:57,719 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 10 mSDsluCounter, 3935 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4594 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:45:57,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4594 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:45:57,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2023-04-02 23:45:57,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 891. [2023-04-02 23:45:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 572 states have (on average 1.513986013986014) internal successors, (866), 605 states have internal predecessors, (866), 234 states have call successors, (234), 87 states have call predecessors, (234), 84 states have return successors, (232), 222 states have call predecessors, (232), 226 states have call successors, (232) [2023-04-02 23:45:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1332 transitions. [2023-04-02 23:45:57,754 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1332 transitions. Word has length 145 [2023-04-02 23:45:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:45:57,755 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1332 transitions. [2023-04-02 23:45:57,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 1 states have call successors, (29) [2023-04-02 23:45:57,755 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1332 transitions. [2023-04-02 23:45:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-02 23:45:57,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:45:57,758 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-02 23:45:57,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:45:57,758 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:45:57,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:45:57,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1693358747, now seen corresponding path program 1 times [2023-04-02 23:45:57,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:45:57,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968870118] [2023-04-02 23:45:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:45:57,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:45:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 23:46:02,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:02,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968870118] [2023-04-02 23:46:02,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968870118] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:46:02,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470686860] [2023-04-02 23:46:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:02,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:46:02,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:46:02,243 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) [2023-04-02 23:46:02,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:46:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:02,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 123 conjunts are in the unsatisfiable core [2023-04-02 23:46:02,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:46:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 23:46:03,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:46:03,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470686860] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:46:03,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:46:03,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [32] total 48 [2023-04-02 23:46:03,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535400467] [2023-04-02 23:46:03,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:46:03,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 23:46:03,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:46:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 23:46:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2120, Unknown=0, NotChecked=0, Total=2256 [2023-04-02 23:46:03,669 INFO L87 Difference]: Start difference. First operand 891 states and 1332 transitions. Second operand has 18 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 14 states have internal predecessors, (74), 8 states have call successors, (36), 4 states have call predecessors, (36), 9 states have return successors, (32), 9 states have call predecessors, (32), 7 states have call successors, (32) [2023-04-02 23:46:07,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:46:07,474 INFO L93 Difference]: Finished difference Result 1728 states and 2611 transitions. [2023-04-02 23:46:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 23:46:07,475 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 14 states have internal predecessors, (74), 8 states have call successors, (36), 4 states have call predecessors, (36), 9 states have return successors, (32), 9 states have call predecessors, (32), 7 states have call successors, (32) Word has length 160 [2023-04-02 23:46:07,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:46:07,478 INFO L225 Difference]: With dead ends: 1728 [2023-04-02 23:46:07,478 INFO L226 Difference]: Without dead ends: 890 [2023-04-02 23:46:07,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=229, Invalid=3677, Unknown=0, NotChecked=0, Total=3906 [2023-04-02 23:46:07,482 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 857 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 8674 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 9161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 8674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:46:07,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 1650 Invalid, 9161 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [487 Valid, 8674 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-02 23:46:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2023-04-02 23:46:07,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 884. [2023-04-02 23:46:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 568 states have (on average 1.5088028169014085) internal successors, (857), 600 states have internal predecessors, (857), 231 states have call successors, (231), 87 states have call predecessors, (231), 84 states have return successors, (230), 220 states have call predecessors, (230), 224 states have call successors, (230) [2023-04-02 23:46:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1318 transitions. [2023-04-02 23:46:07,516 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1318 transitions. Word has length 160 [2023-04-02 23:46:07,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:46:07,517 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1318 transitions. [2023-04-02 23:46:07,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 14 states have internal predecessors, (74), 8 states have call successors, (36), 4 states have call predecessors, (36), 9 states have return successors, (32), 9 states have call predecessors, (32), 7 states have call successors, (32) [2023-04-02 23:46:07,517 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1318 transitions. [2023-04-02 23:46:07,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-02 23:46:07,519 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:46:07,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-02 23:46:07,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 23:46:07,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:46:07,720 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:46:07,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:46:07,721 INFO L85 PathProgramCache]: Analyzing trace with hash 954214940, now seen corresponding path program 1 times [2023-04-02 23:46:07,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:46:07,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392694372] [2023-04-02 23:46:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:07,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:46:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:46:09,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:46:09,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392694372] [2023-04-02 23:46:09,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392694372] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:46:09,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279740950] [2023-04-02 23:46:09,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:46:09,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:46:09,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:46:09,267 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) [2023-04-02 23:46:09,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:46:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:46:09,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 129 conjunts are in the unsatisfiable core [2023-04-02 23:46:09,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:46:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 23:46:10,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:46:50,881 WARN L223 SmtUtils]: Spent 39.43s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-02 23:47:30,820 WARN L223 SmtUtils]: Spent 38.98s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-02 23:48:11,674 WARN L223 SmtUtils]: Spent 40.43s on a formula simplification. DAG size of input: 1487 DAG size of output: 97 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-02 23:48:53,142 WARN L223 SmtUtils]: Spent 37.68s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)