/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_spec2_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:40:29,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:40:29,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:40:29,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:40:29,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:40:29,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:40:29,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:40:29,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:40:29,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:40:29,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:40:29,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:40:29,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:40:29,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:40:29,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:40:29,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:40:29,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:40:29,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:40:29,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:40:29,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:40:29,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:40:29,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:40:29,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:40:29,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:40:29,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:40:29,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:40:29,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:40:29,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:40:29,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:40:29,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:40:29,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:40:29,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:40:29,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:40:29,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:40:29,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:40:29,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:40:29,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:40:29,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:40:29,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:40:29,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:40:29,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:40:29,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:40:29,590 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 11:40:29,617 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:40:29,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:40:29,617 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:40:29,618 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:40:29,618 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:40:29,618 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:40:29,618 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:40:29,619 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:40:29,619 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:40:29,619 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:40:29,620 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:40:29,620 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:40:29,620 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:40:29,620 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:40:29,620 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:40:29,620 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:40:29,620 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:40:29,620 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:40:29,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:40:29,621 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:40:29,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:40:29,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:40:29,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:40:29,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:40:29,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:40:29,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:40:29,622 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:40:29,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:40:29,622 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:40:29,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:40:29,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:40:29,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:40:29,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:40:29,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:40:29,623 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:40:29,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:40:29,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:40:29,623 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:40:29,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:40:29,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:40:29,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:40:29,624 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:40:29,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:40:29,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:40:29,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:40:29,865 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:40:29,865 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:40:29,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2023-04-01 11:40:31,008 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:40:31,323 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:40:31,323 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2023-04-01 11:40:31,349 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cbcd36a3/f0afd45ab12c43f48181ec83086fbfab/FLAG9b2ede072 [2023-04-01 11:40:31,360 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cbcd36a3/f0afd45ab12c43f48181ec83086fbfab [2023-04-01 11:40:31,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:40:31,363 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:40:31,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:40:31,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:40:31,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:40:31,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:40:31" (1/1) ... [2023-04-01 11:40:31,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10340b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:31, skipping insertion in model container [2023-04-01 11:40:31,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:40:31" (1/1) ... [2023-04-01 11:40:31,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:40:31,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:40:31,812 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_spec2_product18.cil.c[38051,38064] [2023-04-01 11:40:31,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:40:31,913 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:40:31,988 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_spec2_product18.cil.c[38051,38064] [2023-04-01 11:40:32,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:40:32,058 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:40:32,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:32 WrapperNode [2023-04-01 11:40:32,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:40:32,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:40:32,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:40:32,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:40:32,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:32" (1/1) ... [2023-04-01 11:40:32,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:32" (1/1) ... [2023-04-01 11:40:32,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:32" (1/1) ... [2023-04-01 11:40:32,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:32" (1/1) ... [2023-04-01 11:40:32,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:32" (1/1) ... [2023-04-01 11:40:32,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:32" (1/1) ... [2023-04-01 11:40:32,186 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:32" (1/1) ... [2023-04-01 11:40:32,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:32" (1/1) ... [2023-04-01 11:40:32,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:40:32,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:40:32,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:40:32,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:40:32,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:32" (1/1) ... [2023-04-01 11:40:32,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:40:32,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:40:32,262 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 11:40:32,312 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 11:40:32,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:40:32,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:40:32,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 11:40:32,336 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:40:32,337 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 11:40:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 11:40:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 11:40:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 11:40:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 11:40:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 11:40:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 11:40:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 11:40:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 11:40:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 11:40:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 11:40:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 11:40:32,339 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 11:40:32,339 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-01 11:40:32,339 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 11:40:32,339 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 11:40:32,339 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 11:40:32,339 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 11:40:32,339 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 11:40:32,339 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 11:40:32,339 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 11:40:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 11:40:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 11:40:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 11:40:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 11:40:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 11:40:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 11:40:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 11:40:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 11:40:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 11:40:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 11:40:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 11:40:32,341 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2023-04-01 11:40:32,341 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 11:40:32,341 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__weight [2023-04-01 11:40:32,341 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 11:40:32,341 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 11:40:32,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 11:40:32,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 11:40:32,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 11:40:32,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 11:40:32,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 11:40:32,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 11:40:32,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 11:40:32,343 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 11:40:32,343 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 11:40:32,343 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 11:40:32,343 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 11:40:32,343 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 11:40:32,344 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 11:40:32,344 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 11:40:32,344 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 11:40:32,344 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 11:40:32,345 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 11:40:32,345 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 11:40:32,345 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 11:40:32,346 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 11:40:32,346 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 11:40:32,346 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 11:40:32,346 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 11:40:32,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:40:32,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2023-04-01 11:40:32,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2023-04-01 11:40:32,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2023-04-01 11:40:32,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2023-04-01 11:40:32,346 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 11:40:32,346 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 11:40:32,347 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 11:40:32,347 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 11:40:32,347 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 11:40:32,347 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 11:40:32,347 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 11:40:32,347 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 11:40:32,347 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:40:32,348 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:40:32,348 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:40:32,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:40:32,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:40:32,348 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 11:40:32,349 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 11:40:32,349 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 11:40:32,349 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 11:40:32,349 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 11:40:32,349 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 11:40:32,349 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 11:40:32,349 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 11:40:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 11:40:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 11:40:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 11:40:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 11:40:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 11:40:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 11:40:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 11:40:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 11:40:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 11:40:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 11:40:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 11:40:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 11:40:32,351 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 11:40:32,351 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 11:40:32,351 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 11:40:32,351 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 11:40:32,351 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 11:40:32,351 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 11:40:32,351 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 11:40:32,351 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 11:40:32,351 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 11:40:32,352 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 11:40:32,352 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 11:40:32,352 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 11:40:32,352 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-01 11:40:32,352 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 11:40:32,353 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 11:40:32,353 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2023-04-01 11:40:32,353 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 11:40:32,353 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 11:40:32,353 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 11:40:32,353 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 11:40:32,354 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 11:40:32,354 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 11:40:32,354 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 11:40:32,354 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 11:40:32,354 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 11:40:32,354 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2023-04-01 11:40:32,354 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2023-04-01 11:40:32,354 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__weight [2023-04-01 11:40:32,354 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 11:40:32,354 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 11:40:32,354 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 11:40:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 11:40:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 11:40:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 11:40:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 11:40:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:40:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 11:40:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 11:40:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:40:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 11:40:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 11:40:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 11:40:32,356 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 11:40:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 11:40:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 11:40:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 11:40:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2023-04-01 11:40:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2023-04-01 11:40:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 11:40:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:40:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 11:40:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:40:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:40:32,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:40:32,634 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:40:32,638 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:40:33,702 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:40:34,513 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:40:34,513 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 11:40:34,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:40:34 BoogieIcfgContainer [2023-04-01 11:40:34,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:40:34,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:40:34,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:40:34,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:40:34,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:40:31" (1/3) ... [2023-04-01 11:40:34,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b0e143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:40:34, skipping insertion in model container [2023-04-01 11:40:34,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:40:32" (2/3) ... [2023-04-01 11:40:34,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b0e143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:40:34, skipping insertion in model container [2023-04-01 11:40:34,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:40:34" (3/3) ... [2023-04-01 11:40:34,526 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product18.cil.c [2023-04-01 11:40:34,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:40:34,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:40:34,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:40:34,618 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;@a422500, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:40:34,618 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:40:34,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 557 states, 325 states have (on average 1.4984615384615385) internal successors, (487), 354 states have internal predecessors, (487), 170 states have call successors, (170), 49 states have call predecessors, (170), 49 states have return successors, (170), 160 states have call predecessors, (170), 170 states have call successors, (170) [2023-04-01 11:40:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 11:40:34,652 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:34,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:40:34,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:34,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:34,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1551893867, now seen corresponding path program 1 times [2023-04-01 11:40:34,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:34,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025262821] [2023-04-01 11:40:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:34,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:40:35,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:35,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025262821] [2023-04-01 11:40:35,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025262821] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:35,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:35,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:40:35,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853047561] [2023-04-01 11:40:35,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:35,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:40:35,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:40:35,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:40:35,260 INFO L87 Difference]: Start difference. First operand has 557 states, 325 states have (on average 1.4984615384615385) internal successors, (487), 354 states have internal predecessors, (487), 170 states have call successors, (170), 49 states have call predecessors, (170), 49 states have return successors, (170), 160 states have call predecessors, (170), 170 states have call successors, (170) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2023-04-01 11:40:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:35,433 INFO L93 Difference]: Finished difference Result 454 states and 681 transitions. [2023-04-01 11:40:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:40:35,435 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 74 [2023-04-01 11:40:35,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:35,450 INFO L225 Difference]: With dead ends: 454 [2023-04-01 11:40:35,451 INFO L226 Difference]: Without dead ends: 420 [2023-04-01 11:40:35,454 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 [2023-04-01 11:40:35,456 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:35,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 603 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:40:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2023-04-01 11:40:35,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2023-04-01 11:40:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 266 states have (on average 1.5488721804511278) internal successors, (412), 287 states have internal predecessors, (412), 113 states have call successors, (113), 44 states have call predecessors, (113), 40 states have return successors, (105), 101 states have call predecessors, (105), 105 states have call successors, (105) [2023-04-01 11:40:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 630 transitions. [2023-04-01 11:40:35,544 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 630 transitions. Word has length 74 [2023-04-01 11:40:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:35,545 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 630 transitions. [2023-04-01 11:40:35,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2023-04-01 11:40:35,546 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 630 transitions. [2023-04-01 11:40:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 11:40:35,552 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:35,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:40:35,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:40:35,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:35,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:35,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1508228122, now seen corresponding path program 1 times [2023-04-01 11:40:35,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:35,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422194104] [2023-04-01 11:40:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:35,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:40:36,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:36,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422194104] [2023-04-01 11:40:36,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422194104] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:36,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:36,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:40:36,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523522596] [2023-04-01 11:40:36,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:36,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:40:36,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:40:36,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:40:36,361 INFO L87 Difference]: Start difference. First operand 420 states and 630 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 6 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-01 11:40:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:38,495 INFO L93 Difference]: Finished difference Result 1285 states and 1996 transitions. [2023-04-01 11:40:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:40:38,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 6 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 75 [2023-04-01 11:40:38,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:38,504 INFO L225 Difference]: With dead ends: 1285 [2023-04-01 11:40:38,504 INFO L226 Difference]: Without dead ends: 907 [2023-04-01 11:40:38,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:40:38,510 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 2043 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2117 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:38,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2117 Valid, 448 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [900 Valid, 1629 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 11:40:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2023-04-01 11:40:38,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 814. [2023-04-01 11:40:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 543 states have (on average 1.5819521178637201) internal successors, (859), 573 states have internal predecessors, (859), 203 states have call successors, (203), 68 states have call predecessors, (203), 67 states have return successors, (205), 182 states have call predecessors, (205), 195 states have call successors, (205) [2023-04-01 11:40:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1267 transitions. [2023-04-01 11:40:38,602 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1267 transitions. Word has length 75 [2023-04-01 11:40:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:38,603 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1267 transitions. [2023-04-01 11:40:38,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 6 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-01 11:40:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1267 transitions. [2023-04-01 11:40:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-01 11:40:38,606 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:38,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:40:38,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:40:38,606 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:38,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:38,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1992742907, now seen corresponding path program 1 times [2023-04-01 11:40:38,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:38,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160102703] [2023-04-01 11:40:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:38,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:40:39,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:39,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160102703] [2023-04-01 11:40:39,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160102703] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:39,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:39,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 11:40:39,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381484273] [2023-04-01 11:40:39,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:39,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 11:40:39,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 11:40:39,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:40:39,292 INFO L87 Difference]: Start difference. First operand 814 states and 1267 transitions. Second operand has 12 states, 9 states have (on average 6.222222222222222) internal successors, (56), 10 states have internal predecessors, (56), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (21), 8 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-01 11:40:43,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:43,419 INFO L93 Difference]: Finished difference Result 2432 states and 3817 transitions. [2023-04-01 11:40:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 11:40:43,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 6.222222222222222) internal successors, (56), 10 states have internal predecessors, (56), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (21), 8 states have call predecessors, (21), 5 states have call successors, (21) Word has length 102 [2023-04-01 11:40:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:43,435 INFO L225 Difference]: With dead ends: 2432 [2023-04-01 11:40:43,435 INFO L226 Difference]: Without dead ends: 1660 [2023-04-01 11:40:43,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2023-04-01 11:40:43,451 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 1467 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 7923 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 8658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 7923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:43,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1511 Valid, 1285 Invalid, 8658 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [735 Valid, 7923 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 11:40:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2023-04-01 11:40:43,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1601. [2023-04-01 11:40:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1083 states have (on average 1.5687903970452446) internal successors, (1699), 1130 states have internal predecessors, (1699), 383 states have call successors, (383), 122 states have call predecessors, (383), 134 states have return successors, (415), 368 states have call predecessors, (415), 375 states have call successors, (415) [2023-04-01 11:40:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2497 transitions. [2023-04-01 11:40:43,634 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2497 transitions. Word has length 102 [2023-04-01 11:40:43,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:43,636 INFO L495 AbstractCegarLoop]: Abstraction has 1601 states and 2497 transitions. [2023-04-01 11:40:43,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 6.222222222222222) internal successors, (56), 10 states have internal predecessors, (56), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (21), 8 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-01 11:40:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2497 transitions. [2023-04-01 11:40:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 11:40:43,641 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:43,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:40:43,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 11:40:43,642 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:43,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:43,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1436431259, now seen corresponding path program 1 times [2023-04-01 11:40:43,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:43,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188454637] [2023-04-01 11:40:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:43,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:40:43,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:43,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188454637] [2023-04-01 11:40:43,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188454637] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:43,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:43,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:40:43,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921899898] [2023-04-01 11:40:43,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:43,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:40:43,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:43,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:40:43,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:40:43,999 INFO L87 Difference]: Start difference. First operand 1601 states and 2497 transitions. Second operand has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2023-04-01 11:40:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:44,298 INFO L93 Difference]: Finished difference Result 3440 states and 5450 transitions. [2023-04-01 11:40:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:40:44,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 103 [2023-04-01 11:40:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:44,313 INFO L225 Difference]: With dead ends: 3440 [2023-04-01 11:40:44,313 INFO L226 Difference]: Without dead ends: 1883 [2023-04-01 11:40:44,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 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 11:40:44,328 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 33 mSDsluCounter, 3623 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 4230 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:44,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 4230 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:40:44,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2023-04-01 11:40:44,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1625. [2023-04-01 11:40:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1101 states have (on average 1.5594913714804723) internal successors, (1717), 1148 states have internal predecessors, (1717), 383 states have call successors, (383), 122 states have call predecessors, (383), 140 states have return successors, (421), 374 states have call predecessors, (421), 375 states have call successors, (421) [2023-04-01 11:40:44,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2521 transitions. [2023-04-01 11:40:44,441 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2521 transitions. Word has length 103 [2023-04-01 11:40:44,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:44,442 INFO L495 AbstractCegarLoop]: Abstraction has 1625 states and 2521 transitions. [2023-04-01 11:40:44,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2023-04-01 11:40:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2521 transitions. [2023-04-01 11:40:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 11:40:44,449 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:44,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:40:44,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 11:40:44,450 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:44,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:44,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1765581036, now seen corresponding path program 1 times [2023-04-01 11:40:44,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:44,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594394017] [2023-04-01 11:40:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:44,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:40:44,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:44,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594394017] [2023-04-01 11:40:44,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594394017] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:44,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:44,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:40:44,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124387461] [2023-04-01 11:40:44,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:44,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:40:44,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:44,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:40:44,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:40:44,916 INFO L87 Difference]: Start difference. First operand 1625 states and 2521 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-01 11:40:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:47,472 INFO L93 Difference]: Finished difference Result 4452 states and 6996 transitions. [2023-04-01 11:40:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 11:40:47,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) Word has length 107 [2023-04-01 11:40:47,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:47,490 INFO L225 Difference]: With dead ends: 4452 [2023-04-01 11:40:47,490 INFO L226 Difference]: Without dead ends: 2871 [2023-04-01 11:40:47,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:40:47,499 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 1698 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 3344 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1771 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 3854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 3344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:47,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1771 Valid, 652 Invalid, 3854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 3344 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 11:40:47,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2023-04-01 11:40:47,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2806. [2023-04-01 11:40:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2806 states, 1957 states have (on average 1.5937659683188554) internal successors, (3119), 2035 states have internal predecessors, (3119), 621 states have call successors, (621), 194 states have call predecessors, (621), 227 states have return successors, (691), 606 states have call predecessors, (691), 613 states have call successors, (691) [2023-04-01 11:40:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 4431 transitions. [2023-04-01 11:40:47,747 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 4431 transitions. Word has length 107 [2023-04-01 11:40:47,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:47,749 INFO L495 AbstractCegarLoop]: Abstraction has 2806 states and 4431 transitions. [2023-04-01 11:40:47,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-01 11:40:47,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 4431 transitions. [2023-04-01 11:40:47,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 11:40:47,753 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:47,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:40:47,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 11:40:47,753 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:47,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:47,755 INFO L85 PathProgramCache]: Analyzing trace with hash -531347881, now seen corresponding path program 1 times [2023-04-01 11:40:47,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:47,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336970054] [2023-04-01 11:40:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:47,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:40:47,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:47,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336970054] [2023-04-01 11:40:47,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336970054] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:47,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:47,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:40:47,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979224287] [2023-04-01 11:40:47,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:47,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:40:47,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:47,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:40:47,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:40:47,977 INFO L87 Difference]: Start difference. First operand 2806 states and 4431 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 11:40:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:48,235 INFO L93 Difference]: Finished difference Result 4889 states and 7751 transitions. [2023-04-01 11:40:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:40:48,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 111 [2023-04-01 11:40:48,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:48,260 INFO L225 Difference]: With dead ends: 4889 [2023-04-01 11:40:48,261 INFO L226 Difference]: Without dead ends: 2870 [2023-04-01 11:40:48,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:40:48,271 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 7 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:48,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2349 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:40:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2023-04-01 11:40:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2846. [2023-04-01 11:40:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2846 states, 1987 states have (on average 1.5848012078510316) internal successors, (3149), 2065 states have internal predecessors, (3149), 621 states have call successors, (621), 194 states have call predecessors, (621), 237 states have return successors, (711), 616 states have call predecessors, (711), 613 states have call successors, (711) [2023-04-01 11:40:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2846 states to 2846 states and 4481 transitions. [2023-04-01 11:40:48,526 INFO L78 Accepts]: Start accepts. Automaton has 2846 states and 4481 transitions. Word has length 111 [2023-04-01 11:40:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:48,526 INFO L495 AbstractCegarLoop]: Abstraction has 2846 states and 4481 transitions. [2023-04-01 11:40:48,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 11:40:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2846 states and 4481 transitions. [2023-04-01 11:40:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 11:40:48,530 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:48,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:40:48,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 11:40:48,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:48,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:48,531 INFO L85 PathProgramCache]: Analyzing trace with hash 952777135, now seen corresponding path program 1 times [2023-04-01 11:40:48,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:48,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112470974] [2023-04-01 11:40:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:48,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:40:49,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:49,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112470974] [2023-04-01 11:40:49,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112470974] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:49,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:49,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:40:49,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986068951] [2023-04-01 11:40:49,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:49,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:40:49,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:49,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:40:49,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:40:49,073 INFO L87 Difference]: Start difference. First operand 2846 states and 4481 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-01 11:40:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:51,620 INFO L93 Difference]: Finished difference Result 6776 states and 10686 transitions. [2023-04-01 11:40:51,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:40:51,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) Word has length 115 [2023-04-01 11:40:51,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:51,649 INFO L225 Difference]: With dead ends: 6776 [2023-04-01 11:40:51,650 INFO L226 Difference]: Without dead ends: 4525 [2023-04-01 11:40:51,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:40:51,663 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 1950 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 3301 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2115 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 4075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 3301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:51,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2115 Valid, 474 Invalid, 4075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 3301 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 11:40:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4525 states. [2023-04-01 11:40:51,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4525 to 4461. [2023-04-01 11:40:52,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4461 states, 3052 states have (on average 1.5360419397116645) internal successors, (4688), 3183 states have internal predecessors, (4688), 999 states have call successors, (999), 332 states have call predecessors, (999), 409 states have return successors, (1183), 995 states have call predecessors, (1183), 991 states have call successors, (1183) [2023-04-01 11:40:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4461 states to 4461 states and 6870 transitions. [2023-04-01 11:40:52,025 INFO L78 Accepts]: Start accepts. Automaton has 4461 states and 6870 transitions. Word has length 115 [2023-04-01 11:40:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:52,025 INFO L495 AbstractCegarLoop]: Abstraction has 4461 states and 6870 transitions. [2023-04-01 11:40:52,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-01 11:40:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand 4461 states and 6870 transitions. [2023-04-01 11:40:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-01 11:40:52,028 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:52,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:40:52,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 11:40:52,029 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:52,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:52,029 INFO L85 PathProgramCache]: Analyzing trace with hash 661666450, now seen corresponding path program 1 times [2023-04-01 11:40:52,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:52,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745560066] [2023-04-01 11:40:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:52,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:40:52,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:52,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745560066] [2023-04-01 11:40:52,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745560066] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:52,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:52,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:40:52,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838638286] [2023-04-01 11:40:52,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:52,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:40:52,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:52,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:40:52,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:40:52,310 INFO L87 Difference]: Start difference. First operand 4461 states and 6870 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 11:40:52,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:52,783 INFO L93 Difference]: Finished difference Result 8867 states and 13964 transitions. [2023-04-01 11:40:52,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:40:52,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 118 [2023-04-01 11:40:52,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:52,813 INFO L225 Difference]: With dead ends: 8867 [2023-04-01 11:40:52,814 INFO L226 Difference]: Without dead ends: 4461 [2023-04-01 11:40:52,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 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 11:40:52,897 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 211 mSDsluCounter, 2858 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 3476 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:52,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 3476 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:40:52,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2023-04-01 11:40:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 4461. [2023-04-01 11:40:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4461 states, 3052 states have (on average 1.4967234600262123) internal successors, (4568), 3183 states have internal predecessors, (4568), 999 states have call successors, (999), 332 states have call predecessors, (999), 409 states have return successors, (1183), 995 states have call predecessors, (1183), 991 states have call successors, (1183) [2023-04-01 11:40:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4461 states to 4461 states and 6750 transitions. [2023-04-01 11:40:53,218 INFO L78 Accepts]: Start accepts. Automaton has 4461 states and 6750 transitions. Word has length 118 [2023-04-01 11:40:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:53,219 INFO L495 AbstractCegarLoop]: Abstraction has 4461 states and 6750 transitions. [2023-04-01 11:40:53,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 11:40:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4461 states and 6750 transitions. [2023-04-01 11:40:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-01 11:40:53,223 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:53,223 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:40:53,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 11:40:53,223 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:53,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:53,224 INFO L85 PathProgramCache]: Analyzing trace with hash -766723503, now seen corresponding path program 1 times [2023-04-01 11:40:53,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:53,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861029115] [2023-04-01 11:40:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:53,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:40:53,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:53,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861029115] [2023-04-01 11:40:53,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861029115] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:53,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:53,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:40:53,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245980007] [2023-04-01 11:40:53,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:53,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:40:53,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:53,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:40:53,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:40:53,707 INFO L87 Difference]: Start difference. First operand 4461 states and 6750 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 11:40:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:55,979 INFO L93 Difference]: Finished difference Result 8424 states and 12762 transitions. [2023-04-01 11:40:55,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:40:55,980 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 120 [2023-04-01 11:40:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:56,051 INFO L225 Difference]: With dead ends: 8424 [2023-04-01 11:40:56,051 INFO L226 Difference]: Without dead ends: 4672 [2023-04-01 11:40:56,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:40:56,069 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 985 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 3138 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 3531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 3138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:56,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 569 Invalid, 3531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 3138 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 11:40:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2023-04-01 11:40:56,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 4551. [2023-04-01 11:40:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4551 states, 3112 states have (on average 1.4916452442159382) internal successors, (4642), 3257 states have internal predecessors, (4642), 1001 states have call successors, (1001), 348 states have call predecessors, (1001), 437 states have return successors, (1221), 995 states have call predecessors, (1221), 993 states have call successors, (1221) [2023-04-01 11:40:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4551 states to 4551 states and 6864 transitions. [2023-04-01 11:40:56,447 INFO L78 Accepts]: Start accepts. Automaton has 4551 states and 6864 transitions. Word has length 120 [2023-04-01 11:40:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:56,447 INFO L495 AbstractCegarLoop]: Abstraction has 4551 states and 6864 transitions. [2023-04-01 11:40:56,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 11:40:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4551 states and 6864 transitions. [2023-04-01 11:40:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-01 11:40:56,450 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:56,450 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:40:56,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 11:40:56,451 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:56,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:56,451 INFO L85 PathProgramCache]: Analyzing trace with hash -572662365, now seen corresponding path program 1 times [2023-04-01 11:40:56,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:56,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245108545] [2023-04-01 11:40:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:56,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 11:40:56,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:56,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245108545] [2023-04-01 11:40:56,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245108545] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:56,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:56,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:40:56,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987304888] [2023-04-01 11:40:56,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:56,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:40:56,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:56,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:40:56,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:40:56,752 INFO L87 Difference]: Start difference. First operand 4551 states and 6864 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 11:40:57,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:57,593 INFO L93 Difference]: Finished difference Result 4604 states and 6946 transitions. [2023-04-01 11:40:57,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:40:57,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 124 [2023-04-01 11:40:57,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:57,614 INFO L225 Difference]: With dead ends: 4604 [2023-04-01 11:40:57,614 INFO L226 Difference]: Without dead ends: 4587 [2023-04-01 11:40:57,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:40:57,617 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 637 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:57,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 1890 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 11:40:57,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2023-04-01 11:40:57,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 4557. [2023-04-01 11:40:57,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 3118 states have (on average 1.490699166132136) internal successors, (4648), 3263 states have internal predecessors, (4648), 1001 states have call successors, (1001), 348 states have call predecessors, (1001), 437 states have return successors, (1221), 995 states have call predecessors, (1221), 993 states have call successors, (1221) [2023-04-01 11:40:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 6870 transitions. [2023-04-01 11:40:57,945 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 6870 transitions. Word has length 124 [2023-04-01 11:40:57,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:57,946 INFO L495 AbstractCegarLoop]: Abstraction has 4557 states and 6870 transitions. [2023-04-01 11:40:57,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 11:40:57,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 6870 transitions. [2023-04-01 11:40:57,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 11:40:57,949 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:57,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:40:57,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 11:40:57,950 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:57,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:57,951 INFO L85 PathProgramCache]: Analyzing trace with hash -767245052, now seen corresponding path program 1 times [2023-04-01 11:40:57,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:57,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2686564] [2023-04-01 11:40:57,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:57,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:40:58,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:58,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2686564] [2023-04-01 11:40:58,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2686564] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:58,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:58,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 11:40:58,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510058505] [2023-04-01 11:40:58,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:58,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 11:40:58,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:58,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 11:40:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:40:58,359 INFO L87 Difference]: Start difference. First operand 4557 states and 6870 transitions. Second operand has 9 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 11:40:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:40:59,154 INFO L93 Difference]: Finished difference Result 4799 states and 7203 transitions. [2023-04-01 11:40:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:40:59,155 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) Word has length 132 [2023-04-01 11:40:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:40:59,181 INFO L225 Difference]: With dead ends: 4799 [2023-04-01 11:40:59,182 INFO L226 Difference]: Without dead ends: 4782 [2023-04-01 11:40:59,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:40:59,187 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 620 mSDsluCounter, 3390 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 3971 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 11:40:59,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 3971 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 11:40:59,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4782 states. [2023-04-01 11:40:59,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4782 to 4696. [2023-04-01 11:40:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4696 states, 3207 states have (on average 1.484253196133458) internal successors, (4760), 3352 states have internal predecessors, (4760), 1031 states have call successors, (1031), 368 states have call predecessors, (1031), 457 states have return successors, (1266), 1025 states have call predecessors, (1266), 1023 states have call successors, (1266) [2023-04-01 11:40:59,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4696 states to 4696 states and 7057 transitions. [2023-04-01 11:40:59,567 INFO L78 Accepts]: Start accepts. Automaton has 4696 states and 7057 transitions. Word has length 132 [2023-04-01 11:40:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:40:59,567 INFO L495 AbstractCegarLoop]: Abstraction has 4696 states and 7057 transitions. [2023-04-01 11:40:59,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 11:40:59,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4696 states and 7057 transitions. [2023-04-01 11:40:59,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 11:40:59,571 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:40:59,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:40:59,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 11:40:59,572 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:40:59,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:40:59,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1969733490, now seen corresponding path program 1 times [2023-04-01 11:40:59,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:40:59,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426428018] [2023-04-01 11:40:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:40:59,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:40:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:40:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 11:40:59,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:40:59,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426428018] [2023-04-01 11:40:59,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426428018] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:40:59,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:40:59,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:40:59,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329119701] [2023-04-01 11:40:59,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:40:59,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:40:59,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:40:59,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:40:59,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:40:59,919 INFO L87 Difference]: Start difference. First operand 4696 states and 7057 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-01 11:41:01,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:01,685 INFO L93 Difference]: Finished difference Result 12201 states and 18810 transitions. [2023-04-01 11:41:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:01,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 147 [2023-04-01 11:41:01,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:01,727 INFO L225 Difference]: With dead ends: 12201 [2023-04-01 11:41:01,728 INFO L226 Difference]: Without dead ends: 7547 [2023-04-01 11:41:01,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 11:41:01,753 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 1133 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:01,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 535 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 11:41:01,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7547 states. [2023-04-01 11:41:02,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7547 to 7310. [2023-04-01 11:41:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7310 states, 4966 states have (on average 1.4796616995569876) internal successors, (7348), 5216 states have internal predecessors, (7348), 1596 states have call successors, (1596), 566 states have call predecessors, (1596), 747 states have return successors, (2185), 1612 states have call predecessors, (2185), 1587 states have call successors, (2185) [2023-04-01 11:41:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7310 states to 7310 states and 11129 transitions. [2023-04-01 11:41:02,394 INFO L78 Accepts]: Start accepts. Automaton has 7310 states and 11129 transitions. Word has length 147 [2023-04-01 11:41:02,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:02,396 INFO L495 AbstractCegarLoop]: Abstraction has 7310 states and 11129 transitions. [2023-04-01 11:41:02,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-01 11:41:02,396 INFO L276 IsEmpty]: Start isEmpty. Operand 7310 states and 11129 transitions. [2023-04-01 11:41:02,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 11:41:02,399 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:02,399 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:02,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 11:41:02,400 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:02,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1355646906, now seen corresponding path program 1 times [2023-04-01 11:41:02,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:02,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899963296] [2023-04-01 11:41:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:02,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 11:41:02,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:02,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899963296] [2023-04-01 11:41:02,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899963296] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:02,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:02,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:41:02,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306482488] [2023-04-01 11:41:02,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:02,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:41:02,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:41:02,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:41:02,777 INFO L87 Difference]: Start difference. First operand 7310 states and 11129 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:04,776 INFO L93 Difference]: Finished difference Result 20135 states and 31987 transitions. [2023-04-01 11:41:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:04,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 145 [2023-04-01 11:41:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:04,847 INFO L225 Difference]: With dead ends: 20135 [2023-04-01 11:41:04,847 INFO L226 Difference]: Without dead ends: 12870 [2023-04-01 11:41:04,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 11:41:04,876 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 1136 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:04,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 540 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 11:41:04,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12870 states. [2023-04-01 11:41:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12870 to 12530. [2023-04-01 11:41:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 8492 states have (on average 1.4746820536975978) internal successors, (12523), 8964 states have internal predecessors, (12523), 2693 states have call successors, (2693), 962 states have call predecessors, (2693), 1344 states have return successors, (4330), 2758 states have call predecessors, (4330), 2682 states have call successors, (4330) [2023-04-01 11:41:06,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 19546 transitions. [2023-04-01 11:41:06,109 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 19546 transitions. Word has length 145 [2023-04-01 11:41:06,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:06,110 INFO L495 AbstractCegarLoop]: Abstraction has 12530 states and 19546 transitions. [2023-04-01 11:41:06,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 19546 transitions. [2023-04-01 11:41:06,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-01 11:41:06,116 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:06,116 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:06,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 11:41:06,116 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:06,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:06,117 INFO L85 PathProgramCache]: Analyzing trace with hash 923320231, now seen corresponding path program 1 times [2023-04-01 11:41:06,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:06,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612181906] [2023-04-01 11:41:06,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:06,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 11:41:06,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:06,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612181906] [2023-04-01 11:41:06,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612181906] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:06,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:06,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:41:06,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399309411] [2023-04-01 11:41:06,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:06,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:41:06,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:06,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:41:06,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:41:06,560 INFO L87 Difference]: Start difference. First operand 12530 states and 19546 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:09,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:09,149 INFO L93 Difference]: Finished difference Result 36068 states and 60331 transitions. [2023-04-01 11:41:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:09,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 146 [2023-04-01 11:41:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:09,294 INFO L225 Difference]: With dead ends: 36068 [2023-04-01 11:41:09,294 INFO L226 Difference]: Without dead ends: 23589 [2023-04-01 11:41:09,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 11:41:09,353 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 1133 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:09,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1202 Valid, 545 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 11:41:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23589 states. [2023-04-01 11:41:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23589 to 23044. [2023-04-01 11:41:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23044 states, 15573 states have (on average 1.4685031785783087) internal successors, (22869), 16513 states have internal predecessors, (22869), 4870 states have call successors, (4870), 1754 states have call predecessors, (4870), 2600 states have return successors, (9779), 5071 states have call predecessors, (9779), 4855 states have call successors, (9779) [2023-04-01 11:41:11,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23044 states to 23044 states and 37518 transitions. [2023-04-01 11:41:11,732 INFO L78 Accepts]: Start accepts. Automaton has 23044 states and 37518 transitions. Word has length 146 [2023-04-01 11:41:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:11,733 INFO L495 AbstractCegarLoop]: Abstraction has 23044 states and 37518 transitions. [2023-04-01 11:41:11,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 23044 states and 37518 transitions. [2023-04-01 11:41:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-01 11:41:11,736 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:11,737 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:11,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 11:41:11,737 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:11,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:11,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1193900379, now seen corresponding path program 1 times [2023-04-01 11:41:11,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:11,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979336187] [2023-04-01 11:41:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:11,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 11:41:12,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:12,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979336187] [2023-04-01 11:41:12,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979336187] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:12,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:12,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:41:12,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184866271] [2023-04-01 11:41:12,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:12,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:41:12,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:12,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:41:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:41:12,083 INFO L87 Difference]: Start difference. First operand 23044 states and 37518 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30)