/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_spec3_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:42:26,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:42:26,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:42:26,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:42:26,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:42:26,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:42:26,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:42:26,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:42:26,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:42:26,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:42:26,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:42:26,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:42:26,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:42:26,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:42:26,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:42:26,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:42:26,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:42:26,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:42:26,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:42:26,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:42:26,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:42:26,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:42:26,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:42:26,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:42:26,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:42:26,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:42:26,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:42:26,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:42:26,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:42:26,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:42:26,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:42:26,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:42:26,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:42:26,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:42:26,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:42:26,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:42:26,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:42:26,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:42:26,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:42:26,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:42:26,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:42:26,588 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 11:42:26,623 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:42:26,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:42:26,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:42:26,624 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:42:26,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:42:26,625 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:42:26,625 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:42:26,625 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:42:26,626 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:42:26,626 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:42:26,627 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:42:26,627 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:42:26,627 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:42:26,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:42:26,627 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:42:26,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:42:26,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:42:26,627 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:42:26,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:42:26,628 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:42:26,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:42:26,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:42:26,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:42:26,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:42:26,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:42:26,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:42:26,629 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:42:26,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:42:26,629 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:42:26,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:42:26,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:42:26,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:42:26,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:42:26,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:42:26,630 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:42:26,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:42:26,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:42:26,630 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:42:26,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:42:26,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:42:26,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:42:26,631 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:42:26,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:42:26,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:42:26,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:42:26,908 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:42:26,909 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:42:26,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2023-04-01 11:42:28,114 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:42:28,435 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:42:28,436 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2023-04-01 11:42:28,460 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b048f4b54/fe15b74790b44ddd92237eedc69efe27/FLAG67c775dc9 [2023-04-01 11:42:28,472 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b048f4b54/fe15b74790b44ddd92237eedc69efe27 [2023-04-01 11:42:28,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:42:28,475 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:42:28,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:42:28,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:42:28,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:42:28,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:42:28" (1/1) ... [2023-04-01 11:42:28,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0ebaad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:42:28, skipping insertion in model container [2023-04-01 11:42:28,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:42:28" (1/1) ... [2023-04-01 11:42:28,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:42:28,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:42:29,030 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2023-04-01 11:42:29,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:42:29,058 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:42:29,126 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2023-04-01 11:42:29,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:42:29,152 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:42:29,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:42:29 WrapperNode [2023-04-01 11:42:29,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:42:29,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:42:29,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:42:29,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:42:29,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:42:29" (1/1) ... [2023-04-01 11:42:29,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:42:29" (1/1) ... [2023-04-01 11:42:29,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:42:29" (1/1) ... [2023-04-01 11:42:29,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:42:29" (1/1) ... [2023-04-01 11:42:29,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:42:29" (1/1) ... [2023-04-01 11:42:29,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:42:29" (1/1) ... [2023-04-01 11:42:29,285 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:42:29" (1/1) ... [2023-04-01 11:42:29,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:42:29" (1/1) ... [2023-04-01 11:42:29,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:42:29,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:42:29,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:42:29,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:42:29,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:42:29" (1/1) ... [2023-04-01 11:42:29,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:42:29,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:42:29,348 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 11:42:29,370 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 11:42:29,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:42:29,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:42:29,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 11:42:29,390 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:42:29,390 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 11:42:29,390 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 11:42:29,390 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 11:42:29,390 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 11:42:29,390 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 11:42:29,390 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 11:42:29,390 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 11:42:29,391 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 11:42:29,391 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 11:42:29,391 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 11:42:29,391 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 11:42:29,391 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 11:42:29,392 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 11:42:29,392 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 11:42:29,392 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 11:42:29,392 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 11:42:29,392 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 11:42:29,392 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 11:42:29,392 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 11:42:29,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:42:29,392 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 11:42:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 11:42:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 11:42:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-01 11:42:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 11:42:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 11:42:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-01 11:42:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 11:42:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 11:42:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 11:42:29,393 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 11:42:29,394 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 11:42:29,394 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 11:42:29,394 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 11:42:29,394 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 11:42:29,394 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 11:42:29,394 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 11:42:29,394 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 11:42:29,394 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 11:42:29,395 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 11:42:29,395 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 11:42:29,396 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 11:42:29,396 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 11:42:29,396 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2023-04-01 11:42:29,396 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 11:42:29,396 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__empty [2023-04-01 11:42:29,396 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 11:42:29,396 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 11:42:29,396 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 11:42:29,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 11:42:29,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 11:42:29,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 11:42:29,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 11:42:29,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 11:42:29,398 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 11:42:29,398 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 11:42:29,398 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 11:42:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 11:42:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 11:42:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 11:42:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 11:42:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 11:42:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 11:42:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 11:42:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 11:42:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 11:42:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 11:42:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 11:42:29,399 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 11:42:29,400 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 11:42:29,400 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2023-04-01 11:42:29,400 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2023-04-01 11:42:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:42:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:42:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:42:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:42:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:42:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 11:42:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 11:42:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 11:42:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 11:42:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 11:42:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 11:42:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 11:42:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 11:42:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 11:42:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 11:42:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 11:42:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 11:42:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 11:42:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 11:42:29,402 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 11:42:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 11:42:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 11:42:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 11:42:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 11:42:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 11:42:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 11:42:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 11:42:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 11:42:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 11:42:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 11:42:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 11:42:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 11:42:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 11:42:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 11:42:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 11:42:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 11:42:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:42:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 11:42:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 11:42:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 11:42:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 11:42:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 11:42:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 11:42:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 11:42:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 11:42:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 11:42:29,408 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 11:42:29,408 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 11:42:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 11:42:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 11:42:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 11:42:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 11:42:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-01 11:42:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 11:42:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-01 11:42:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 11:42:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 11:42:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 11:42:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 11:42:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 11:42:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 11:42:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 11:42:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 11:42:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 11:42:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 11:42:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2023-04-01 11:42:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2023-04-01 11:42:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2023-04-01 11:42:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__empty [2023-04-01 11:42:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 11:42:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 11:42:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 11:42:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 11:42:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 11:42:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 11:42:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:42:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 11:42:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 11:42:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:42:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 11:42:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 11:42:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:42:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 11:42:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 11:42:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 11:42:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 11:42:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 11:42:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 11:42:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:42:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:42:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:42:29,723 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:42:29,728 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:42:31,044 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:42:31,850 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:42:31,850 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 11:42:31,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:42:31 BoogieIcfgContainer [2023-04-01 11:42:31,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:42:31,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:42:31,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:42:31,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:42:31,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:42:28" (1/3) ... [2023-04-01 11:42:31,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@640c8049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:42:31, skipping insertion in model container [2023-04-01 11:42:31,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:42:29" (2/3) ... [2023-04-01 11:42:31,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@640c8049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:42:31, skipping insertion in model container [2023-04-01 11:42:31,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:42:31" (3/3) ... [2023-04-01 11:42:31,863 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product26.cil.c [2023-04-01 11:42:31,881 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:42:31,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:42:31,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:42:31,952 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;@76a6c39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:42:31,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:42:31,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 343 states have (on average 1.4839650145772594) internal successors, (509), 368 states have internal predecessors, (509), 181 states have call successors, (181), 52 states have call predecessors, (181), 52 states have return successors, (181), 174 states have call predecessors, (181), 181 states have call successors, (181) [2023-04-01 11:42:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 11:42:31,970 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:42:31,970 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:42:31,971 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:42:31,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:42:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1941317089, now seen corresponding path program 1 times [2023-04-01 11:42:31,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:42:31,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696910155] [2023-04-01 11:42:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:42:31,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:42:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:42:33,272 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 11:42:33,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:42:33,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696910155] [2023-04-01 11:42:33,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696910155] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:42:33,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:42:33,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 11:42:33,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906076377] [2023-04-01 11:42:33,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:42:33,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:42:33,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:42:33,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:42:33,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:42:33,327 INFO L87 Difference]: Start difference. First operand has 590 states, 343 states have (on average 1.4839650145772594) internal successors, (509), 368 states have internal predecessors, (509), 181 states have call successors, (181), 52 states have call predecessors, (181), 52 states have return successors, (181), 174 states have call predecessors, (181), 181 states have call successors, (181) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-04-01 11:42:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:42:33,813 INFO L93 Difference]: Finished difference Result 1318 states and 2026 transitions. [2023-04-01 11:42:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:42:33,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 81 [2023-04-01 11:42:33,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:42:33,834 INFO L225 Difference]: With dead ends: 1318 [2023-04-01 11:42:33,834 INFO L226 Difference]: Without dead ends: 866 [2023-04-01 11:42:33,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:42:33,846 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 646 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:42:33,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1320 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:42:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-04-01 11:42:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 820. [2023-04-01 11:42:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 537 states have (on average 1.5493482309124766) internal successors, (832), 564 states have internal predecessors, (832), 211 states have call successors, (211), 76 states have call predecessors, (211), 71 states have return successors, (213), 192 states have call predecessors, (213), 204 states have call successors, (213) [2023-04-01 11:42:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1256 transitions. [2023-04-01 11:42:33,959 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1256 transitions. Word has length 81 [2023-04-01 11:42:33,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:42:33,959 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 1256 transitions. [2023-04-01 11:42:33,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-04-01 11:42:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1256 transitions. [2023-04-01 11:42:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-01 11:42:33,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:42:33,967 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] [2023-04-01 11:42:33,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:42:33,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:42:33,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:42:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1985332843, now seen corresponding path program 1 times [2023-04-01 11:42:33,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:42:33,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335864171] [2023-04-01 11:42:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:42:33,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:42:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:42:34,603 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 11:42:34,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:42:34,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335864171] [2023-04-01 11:42:34,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335864171] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:42:34,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:42:34,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:42:34,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232292912] [2023-04-01 11:42:34,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:42:34,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:42:34,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:42:34,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:42:34,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:42:34,611 INFO L87 Difference]: Start difference. First operand 820 states and 1256 transitions. Second operand has 7 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 11:42:36,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:42:36,374 INFO L93 Difference]: Finished difference Result 2446 states and 3840 transitions. [2023-04-01 11:42:36,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 11:42:36,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 109 [2023-04-01 11:42:36,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:42:36,388 INFO L225 Difference]: With dead ends: 2446 [2023-04-01 11:42:36,389 INFO L226 Difference]: Without dead ends: 1657 [2023-04-01 11:42:36,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-04-01 11:42:36,395 INFO L413 NwaCegarLoop]: 1274 mSDtfsCounter, 1255 mSDsluCounter, 3939 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 5213 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 11:42:36,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 5213 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 11:42:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2023-04-01 11:42:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1609. [2023-04-01 11:42:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1059 states have (on average 1.542020774315392) internal successors, (1633), 1120 states have internal predecessors, (1633), 410 states have call successors, (410), 143 states have call predecessors, (410), 139 states have return successors, (455), 372 states have call predecessors, (455), 401 states have call successors, (455) [2023-04-01 11:42:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2498 transitions. [2023-04-01 11:42:36,552 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2498 transitions. Word has length 109 [2023-04-01 11:42:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:42:36,553 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 2498 transitions. [2023-04-01 11:42:36,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 11:42:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2498 transitions. [2023-04-01 11:42:36,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 11:42:36,557 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:42:36,557 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] [2023-04-01 11:42:36,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:42:36,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:42:36,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:42:36,558 INFO L85 PathProgramCache]: Analyzing trace with hash -837297627, now seen corresponding path program 1 times [2023-04-01 11:42:36,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:42:36,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897788977] [2023-04-01 11:42:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:42:36,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:42:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:42:37,009 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 11:42:37,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:42:37,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897788977] [2023-04-01 11:42:37,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897788977] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:42:37,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:42:37,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:42:37,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560898428] [2023-04-01 11:42:37,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:42:37,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:42:37,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:42:37,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:42:37,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:42:37,012 INFO L87 Difference]: Start difference. First operand 1609 states and 2498 transitions. Second operand has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-01 11:42:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:42:39,066 INFO L93 Difference]: Finished difference Result 5863 states and 9213 transitions. [2023-04-01 11:42:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 11:42:39,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 108 [2023-04-01 11:42:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:42:39,104 INFO L225 Difference]: With dead ends: 5863 [2023-04-01 11:42:39,105 INFO L226 Difference]: Without dead ends: 4285 [2023-04-01 11:42:39,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-04-01 11:42:39,119 INFO L413 NwaCegarLoop]: 1074 mSDtfsCounter, 1317 mSDsluCounter, 2623 mSDsCounter, 0 mSdLazyCounter, 2704 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 3697 SdHoareTripleChecker+Invalid, 2804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:42:39,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1336 Valid, 3697 Invalid, 2804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2704 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 11:42:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2023-04-01 11:42:39,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 4269. [2023-04-01 11:42:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4269 states, 2794 states have (on average 1.4960629921259843) internal successors, (4180), 2973 states have internal predecessors, (4180), 1076 states have call successors, (1076), 405 states have call predecessors, (1076), 398 states have return successors, (1301), 970 states have call predecessors, (1301), 1059 states have call successors, (1301) [2023-04-01 11:42:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4269 states to 4269 states and 6557 transitions. [2023-04-01 11:42:39,406 INFO L78 Accepts]: Start accepts. Automaton has 4269 states and 6557 transitions. Word has length 108 [2023-04-01 11:42:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:42:39,407 INFO L495 AbstractCegarLoop]: Abstraction has 4269 states and 6557 transitions. [2023-04-01 11:42:39,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-04-01 11:42:39,407 INFO L276 IsEmpty]: Start isEmpty. Operand 4269 states and 6557 transitions. [2023-04-01 11:42:39,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 11:42:39,415 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:42:39,415 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] [2023-04-01 11:42:39,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 11:42:39,416 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:42:39,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:42:39,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1168053698, now seen corresponding path program 1 times [2023-04-01 11:42:39,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:42:39,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601028137] [2023-04-01 11:42:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:42:39,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:42:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:42:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:42:39,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:42:39,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601028137] [2023-04-01 11:42:39,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601028137] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:42:39,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992511677] [2023-04-01 11:42:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:42:39,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:42:39,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:42:39,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:42:39,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:42:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:42:40,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 2893 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 11:42:40,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:42:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:42:40,621 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:42:40,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992511677] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:42:40,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:42:40,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-04-01 11:42:40,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818711209] [2023-04-01 11:42:40,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:42:40,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:42:40,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:42:40,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:42:40,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:42:40,623 INFO L87 Difference]: Start difference. First operand 4269 states and 6557 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 11:42:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:42:41,144 INFO L93 Difference]: Finished difference Result 12077 states and 19230 transitions. [2023-04-01 11:42:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:42:41,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 112 [2023-04-01 11:42:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:42:41,213 INFO L225 Difference]: With dead ends: 12077 [2023-04-01 11:42:41,213 INFO L226 Difference]: Without dead ends: 7839 [2023-04-01 11:42:41,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:42:41,253 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 603 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:42:41,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 1166 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:42:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7839 states. [2023-04-01 11:42:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7839 to 7529. [2023-04-01 11:42:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7529 states, 4950 states have (on average 1.510909090909091) internal successors, (7479), 5297 states have internal predecessors, (7479), 1878 states have call successors, (1878), 690 states have call predecessors, (1878), 700 states have return successors, (2357), 1697 states have call predecessors, (2357), 1861 states have call successors, (2357) [2023-04-01 11:42:41,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 11714 transitions. [2023-04-01 11:42:41,792 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 11714 transitions. Word has length 112 [2023-04-01 11:42:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:42:41,794 INFO L495 AbstractCegarLoop]: Abstraction has 7529 states and 11714 transitions. [2023-04-01 11:42:41,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 11:42:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 11714 transitions. [2023-04-01 11:42:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 11:42:41,798 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:42:41,799 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] [2023-04-01 11:42:41,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:42:42,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:42:42,009 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:42:42,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:42:42,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1040472711, now seen corresponding path program 1 times [2023-04-01 11:42:42,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:42:42,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868356409] [2023-04-01 11:42:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:42:42,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:42:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:42:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:42:42,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:42:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868356409] [2023-04-01 11:42:42,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868356409] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:42:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060845453] [2023-04-01 11:42:42,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:42:42,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:42:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:42:42,521 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:42:42,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:42:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:42:43,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 11:42:43,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:42:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:42:43,189 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:42:43,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060845453] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:42:43,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:42:43,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-04-01 11:42:43,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148933256] [2023-04-01 11:42:43,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:42:43,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:42:43,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:42:43,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:42:43,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:42:43,191 INFO L87 Difference]: Start difference. First operand 7529 states and 11714 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 11:42:43,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:42:43,719 INFO L93 Difference]: Finished difference Result 16635 states and 26341 transitions. [2023-04-01 11:42:43,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:42:43,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 112 [2023-04-01 11:42:43,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:42:43,807 INFO L225 Difference]: With dead ends: 16635 [2023-04-01 11:42:43,808 INFO L226 Difference]: Without dead ends: 9137 [2023-04-01 11:42:43,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:42:43,859 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 601 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:42:43,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 1199 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:42:43,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9137 states. [2023-04-01 11:42:44,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9137 to 8923. [2023-04-01 11:42:44,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8923 states, 5887 states have (on average 1.5102768812638017) internal successors, (8891), 6291 states have internal predecessors, (8891), 2198 states have call successors, (2198), 813 states have call predecessors, (2198), 837 states have return successors, (2776), 2000 states have call predecessors, (2776), 2181 states have call successors, (2776) [2023-04-01 11:42:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8923 states to 8923 states and 13865 transitions. [2023-04-01 11:42:44,486 INFO L78 Accepts]: Start accepts. Automaton has 8923 states and 13865 transitions. Word has length 112 [2023-04-01 11:42:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:42:44,487 INFO L495 AbstractCegarLoop]: Abstraction has 8923 states and 13865 transitions. [2023-04-01 11:42:44,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 11:42:44,488 INFO L276 IsEmpty]: Start isEmpty. Operand 8923 states and 13865 transitions. [2023-04-01 11:42:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 11:42:44,491 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:42:44,492 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] [2023-04-01 11:42:44,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 11:42:44,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:42:44,703 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:42:44,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:42:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash 395547051, now seen corresponding path program 1 times [2023-04-01 11:42:44,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:42:44,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616617648] [2023-04-01 11:42:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:42:44,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:42:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:42:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 11:42:45,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:42:45,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616617648] [2023-04-01 11:42:45,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616617648] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:42:45,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:42:45,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 11:42:45,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931441287] [2023-04-01 11:42:45,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:42:45,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 11:42:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:42:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 11:42:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 11:42:45,561 INFO L87 Difference]: Start difference. First operand 8923 states and 13865 transitions. Second operand has 10 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-01 11:42:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:42:48,171 INFO L93 Difference]: Finished difference Result 29194 states and 46937 transitions. [2023-04-01 11:42:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 11:42:48,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) Word has length 119 [2023-04-01 11:42:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:42:48,319 INFO L225 Difference]: With dead ends: 29194 [2023-04-01 11:42:48,319 INFO L226 Difference]: Without dead ends: 20302 [2023-04-01 11:42:48,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-04-01 11:42:48,372 INFO L413 NwaCegarLoop]: 1282 mSDtfsCounter, 1245 mSDsluCounter, 7846 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 9128 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 11:42:48,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 9128 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2619 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 11:42:48,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20302 states. [2023-04-01 11:42:49,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20302 to 19816. [2023-04-01 11:42:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19816 states, 13234 states have (on average 1.5142058334592716) internal successors, (20039), 14133 states have internal predecessors, (20039), 4750 states have call successors, (4750), 1759 states have call predecessors, (4750), 1831 states have return successors, (6723), 4266 states have call predecessors, (6723), 4719 states have call successors, (6723) [2023-04-01 11:42:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19816 states to 19816 states and 31512 transitions. [2023-04-01 11:42:49,686 INFO L78 Accepts]: Start accepts. Automaton has 19816 states and 31512 transitions. Word has length 119 [2023-04-01 11:42:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:42:49,687 INFO L495 AbstractCegarLoop]: Abstraction has 19816 states and 31512 transitions. [2023-04-01 11:42:49,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-01 11:42:49,687 INFO L276 IsEmpty]: Start isEmpty. Operand 19816 states and 31512 transitions. [2023-04-01 11:42:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 11:42:49,691 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:42:49,692 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] [2023-04-01 11:42:49,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 11:42:49,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:42:49,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:42:49,693 INFO L85 PathProgramCache]: Analyzing trace with hash 81833054, now seen corresponding path program 1 times [2023-04-01 11:42:49,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:42:49,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8808272] [2023-04-01 11:42:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:42:49,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:42:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:42:50,230 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 11:42:50,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:42:50,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8808272] [2023-04-01 11:42:50,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8808272] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:42:50,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:42:50,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:42:50,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692924811] [2023-04-01 11:42:50,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:42:50,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:42:50,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:42:50,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:42:50,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:42:50,232 INFO L87 Difference]: Start difference. First operand 19816 states and 31512 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 11:42:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:42:51,410 INFO L93 Difference]: Finished difference Result 38874 states and 63128 transitions. [2023-04-01 11:42:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:42:51,411 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 125 [2023-04-01 11:42:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:42:51,605 INFO L225 Difference]: With dead ends: 38874 [2023-04-01 11:42:51,605 INFO L226 Difference]: Without dead ends: 21894 [2023-04-01 11:42:51,709 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 11:42:51,710 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 33 mSDsluCounter, 3808 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 4444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:42:51,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 4444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:42:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21894 states. [2023-04-01 11:42:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21894 to 20979. [2023-04-01 11:42:52,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20979 states, 13968 states have (on average 1.5133877434135166) internal successors, (21139), 15020 states have internal predecessors, (21139), 5106 states have call successors, (5106), 1759 states have call predecessors, (5106), 1904 states have return successors, (7251), 4617 states have call predecessors, (7251), 5075 states have call successors, (7251) [2023-04-01 11:42:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20979 states to 20979 states and 33496 transitions. [2023-04-01 11:42:52,923 INFO L78 Accepts]: Start accepts. Automaton has 20979 states and 33496 transitions. Word has length 125 [2023-04-01 11:42:52,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:42:52,925 INFO L495 AbstractCegarLoop]: Abstraction has 20979 states and 33496 transitions. [2023-04-01 11:42:52,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 11:42:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand 20979 states and 33496 transitions. [2023-04-01 11:42:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-01 11:42:52,930 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:42:52,930 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:42:52,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 11:42:52,930 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:42:52,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:42:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1785078629, now seen corresponding path program 1 times [2023-04-01 11:42:52,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:42:52,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891578494] [2023-04-01 11:42:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:42:52,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:42:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:42:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 11:42:53,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:42:53,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891578494] [2023-04-01 11:42:53,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891578494] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:42:53,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:42:53,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 11:42:53,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9513435] [2023-04-01 11:42:53,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:42:53,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 11:42:53,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:42:53,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 11:42:53,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-04-01 11:42:53,489 INFO L87 Difference]: Start difference. First operand 20979 states and 33496 transitions. Second operand has 11 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 7 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2023-04-01 11:42:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:42:58,495 INFO L93 Difference]: Finished difference Result 44680 states and 73388 transitions. [2023-04-01 11:42:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 11:42:58,496 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 7 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) Word has length 129 [2023-04-01 11:42:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:42:58,734 INFO L225 Difference]: With dead ends: 44680 [2023-04-01 11:42:58,734 INFO L226 Difference]: Without dead ends: 26875 [2023-04-01 11:42:58,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-04-01 11:42:58,867 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1828 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 5906 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 6587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 5906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 11:42:58,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1924 Valid, 1370 Invalid, 6587 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [681 Valid, 5906 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 11:42:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26875 states. [2023-04-01 11:43:00,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26875 to 24763. [2023-04-01 11:43:00,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24763 states, 17004 states have (on average 1.5372853446247943) internal successors, (26140), 18067 states have internal predecessors, (26140), 5517 states have call successors, (5517), 2005 states have call predecessors, (5517), 2241 states have return successors, (7982), 5015 states have call predecessors, (7982), 5486 states have call successors, (7982) [2023-04-01 11:43:00,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24763 states to 24763 states and 39639 transitions. [2023-04-01 11:43:00,687 INFO L78 Accepts]: Start accepts. Automaton has 24763 states and 39639 transitions. Word has length 129 [2023-04-01 11:43:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:43:00,688 INFO L495 AbstractCegarLoop]: Abstraction has 24763 states and 39639 transitions. [2023-04-01 11:43:00,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 7 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2023-04-01 11:43:00,688 INFO L276 IsEmpty]: Start isEmpty. Operand 24763 states and 39639 transitions. [2023-04-01 11:43:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 11:43:00,692 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:43:00,693 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:43:00,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 11:43:00,693 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:43:00,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:43:00,697 INFO L85 PathProgramCache]: Analyzing trace with hash 941985075, now seen corresponding path program 1 times [2023-04-01 11:43:00,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:43:00,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204046300] [2023-04-01 11:43:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:43:00,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:43:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:43:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 11:43:01,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:43:01,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204046300] [2023-04-01 11:43:01,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204046300] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:43:01,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:43:01,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 11:43:01,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219063419] [2023-04-01 11:43:01,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:43:01,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:43:01,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:43:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:43:01,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:43:01,498 INFO L87 Difference]: Start difference. First operand 24763 states and 39639 transitions. Second operand has 16 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 7 states have call successors, (33), 5 states have call predecessors, (33), 7 states have return successors, (26), 8 states have call predecessors, (26), 6 states have call successors, (26) [2023-04-01 11:43:11,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:43:11,854 INFO L93 Difference]: Finished difference Result 103280 states and 177327 transitions. [2023-04-01 11:43:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-01 11:43:11,855 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 7 states have call successors, (33), 5 states have call predecessors, (33), 7 states have return successors, (26), 8 states have call predecessors, (26), 6 states have call successors, (26) Word has length 132 [2023-04-01 11:43:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:43:12,692 INFO L225 Difference]: With dead ends: 103280 [2023-04-01 11:43:12,692 INFO L226 Difference]: Without dead ends: 82587 [2023-04-01 11:43:12,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=480, Invalid=2490, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 11:43:12,863 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 4055 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 9159 mSolverCounterSat, 2232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4061 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 11391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2232 IncrementalHoareTripleChecker+Valid, 9159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-04-01 11:43:12,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4061 Valid, 1636 Invalid, 11391 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2232 Valid, 9159 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-04-01 11:43:12,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82587 states.