/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:38:14,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:38:14,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:38:14,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:38:14,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:38:14,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:38:14,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:38:14,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:38:14,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:38:14,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:38:14,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:38:14,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:38:14,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:38:14,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:38:14,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:38:14,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:38:14,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:38:14,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:38:14,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:38:14,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:38:14,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:38:14,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:38:14,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:38:14,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:38:14,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:38:14,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:38:14,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:38:14,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:38:14,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:38:14,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:38:14,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:38:14,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:38:14,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:38:14,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:38:14,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:38:14,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:38:14,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:38:14,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:38:14,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:38:14,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:38:14,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:38:14,240 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 05:38:14,253 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:38:14,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:38:14,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:38:14,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:38:14,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:38:14,254 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:38:14,254 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:38:14,254 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:38:14,254 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:38:14,254 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:38:14,255 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:38:14,255 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:38:14,255 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:38:14,255 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:38:14,255 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:38:14,255 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:38:14,255 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:38:14,255 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:38:14,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:38:14,255 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:38:14,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:38:14,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:38:14,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:38:14,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:38:14,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:38:14,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:38:14,256 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:38:14,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:38:14,256 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:38:14,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:38:14,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:38:14,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:38:14,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:38:14,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:38:14,257 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:38:14,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:38:14,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:38:14,257 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:38:14,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:38:14,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:38:14,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:38:14,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:38:14,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:38:14,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:38:14,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:38:14,401 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:38:14,401 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:38:14,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2023-04-01 05:38:15,370 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:38:15,675 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:38:15,675 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2023-04-01 05:38:15,691 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80ff3a965/e1fce00e25504e9fa3f577dcebed36c4/FLAG440ea9bab [2023-04-01 05:38:15,707 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80ff3a965/e1fce00e25504e9fa3f577dcebed36c4 [2023-04-01 05:38:15,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:38:15,710 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:38:15,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:38:15,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:38:15,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:38:15,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:38:15" (1/1) ... [2023-04-01 05:38:15,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c8d7f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:15, skipping insertion in model container [2023-04-01 05:38:15,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:38:15" (1/1) ... [2023-04-01 05:38:15,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:38:15,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:38:16,167 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_spec9_product27.cil.c[66437,66450] [2023-04-01 05:38:16,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:38:16,192 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:38:16,284 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_spec9_product27.cil.c[66437,66450] [2023-04-01 05:38:16,287 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:38:16,309 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:38:16,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:16 WrapperNode [2023-04-01 05:38:16,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:38:16,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:38:16,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:38:16,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:38:16,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:16" (1/1) ... [2023-04-01 05:38:16,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:16" (1/1) ... [2023-04-01 05:38:16,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:16" (1/1) ... [2023-04-01 05:38:16,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:16" (1/1) ... [2023-04-01 05:38:16,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:16" (1/1) ... [2023-04-01 05:38:16,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:16" (1/1) ... [2023-04-01 05:38:16,396 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:16" (1/1) ... [2023-04-01 05:38:16,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:16" (1/1) ... [2023-04-01 05:38:16,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:38:16,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:38:16,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:38:16,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:38:16,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:16" (1/1) ... [2023-04-01 05:38:16,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:38:16,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:16,454 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 05:38:16,463 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 05:38:16,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:38:16,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:38:16,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 05:38:16,511 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:38:16,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 05:38:16,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 05:38:16,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 05:38:16,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 05:38:16,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 05:38:16,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 05:38:16,511 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 05:38:16,511 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 05:38:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 05:38:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 05:38:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 05:38:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 05:38:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 05:38:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 05:38:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 05:38:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 05:38:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 05:38:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 05:38:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 05:38:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 05:38:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 05:38:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 05:38:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 05:38:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 05:38:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:38:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 05:38:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 05:38:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 05:38:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-01 05:38:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 05:38:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 05:38:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-01 05:38:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 05:38:16,513 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 05:38:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 05:38:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 05:38:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 05:38:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 05:38:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 05:38:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 05:38:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 05:38:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 05:38:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-01 05:38:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 05:38:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 05:38:16,514 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 05:38:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-01 05:38:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 05:38:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 05:38:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 05:38:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 05:38:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 05:38:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 05:38:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-01 05:38:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-01 05:38:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 05:38:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 05:38:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 05:38:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 05:38:16,516 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 05:38:16,516 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 05:38:16,516 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 05:38:16,516 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 05:38:16,516 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 05:38:16,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 05:38:16,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__1 [2023-04-01 05:38:16,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__2 [2023-04-01 05:38:16,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__3 [2023-04-01 05:38:16,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__4 [2023-04-01 05:38:16,516 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 05:38:16,516 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 05:38:16,516 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 05:38:16,517 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 05:38:16,517 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 05:38:16,517 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 05:38:16,517 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 05:38:16,529 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:38:16,529 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:38:16,529 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:38:16,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:38:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:38:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 05:38:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 05:38:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 05:38:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 05:38:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 05:38:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:38:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 05:38:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 05:38:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:38:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 05:38:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 05:38:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 05:38:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 05:38:16,532 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 05:38:16,532 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 05:38:16,532 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 05:38:16,532 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 05:38:16,532 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 05:38:16,532 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 05:38:16,532 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 05:38:16,532 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 05:38:16,532 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 05:38:16,532 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 05:38:16,532 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 05:38:16,532 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 05:38:16,532 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__1 [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__4 [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 05:38:16,533 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-01 05:38:16,534 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__2 [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 05:38:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__3 [2023-04-01 05:38:16,536 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 05:38:16,536 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 05:38:16,536 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 05:38:16,536 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 05:38:16,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:38:16,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:38:16,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:38:16,931 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:38:16,935 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:38:18,235 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:38:18,985 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:38:18,985 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 05:38:18,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:38:18 BoogieIcfgContainer [2023-04-01 05:38:18,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:38:18,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:38:18,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:38:18,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:38:18,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:38:15" (1/3) ... [2023-04-01 05:38:18,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c50a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:38:18, skipping insertion in model container [2023-04-01 05:38:18,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:38:16" (2/3) ... [2023-04-01 05:38:18,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c50a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:38:18, skipping insertion in model container [2023-04-01 05:38:18,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:38:18" (3/3) ... [2023-04-01 05:38:18,995 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product27.cil.c [2023-04-01 05:38:19,008 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:38:19,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:38:19,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:38:19,065 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3413fe7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:38:19,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:38:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 567 states, 330 states have (on average 1.481818181818182) internal successors, (489), 357 states have internal predecessors, (489), 172 states have call successors, (172), 52 states have call predecessors, (172), 52 states have return successors, (172), 163 states have call predecessors, (172), 172 states have call successors, (172) [2023-04-01 05:38:19,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 05:38:19,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:19,095 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:19,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:19,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash 541935256, now seen corresponding path program 1 times [2023-04-01 05:38:19,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:19,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468833438] [2023-04-01 05:38:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:19,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:38:19,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:19,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468833438] [2023-04-01 05:38:19,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468833438] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:19,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:19,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:38:19,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753026859] [2023-04-01 05:38:19,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:19,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:38:19,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:19,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:38:19,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:38:19,569 INFO L87 Difference]: Start difference. First operand has 567 states, 330 states have (on average 1.481818181818182) internal successors, (489), 357 states have internal predecessors, (489), 172 states have call successors, (172), 52 states have call predecessors, (172), 52 states have return successors, (172), 163 states have call predecessors, (172), 172 states have call successors, (172) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2023-04-01 05:38:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:19,682 INFO L93 Difference]: Finished difference Result 470 states and 694 transitions. [2023-04-01 05:38:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:38:19,684 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) Word has length 112 [2023-04-01 05:38:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:19,695 INFO L225 Difference]: With dead ends: 470 [2023-04-01 05:38:19,696 INFO L226 Difference]: Without dead ends: 436 [2023-04-01 05:38:19,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:38:19,704 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:19,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 613 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-04-01 05:38:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2023-04-01 05:38:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 274 states have (on average 1.5218978102189782) internal successors, (417), 293 states have internal predecessors, (417), 117 states have call successors, (117), 48 states have call predecessors, (117), 44 states have return successors, (109), 106 states have call predecessors, (109), 109 states have call successors, (109) [2023-04-01 05:38:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 643 transitions. [2023-04-01 05:38:19,776 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 643 transitions. Word has length 112 [2023-04-01 05:38:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:19,777 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 643 transitions. [2023-04-01 05:38:19,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2023-04-01 05:38:19,777 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 643 transitions. [2023-04-01 05:38:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 05:38:19,780 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:19,781 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:19,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:38:19,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:19,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:19,781 INFO L85 PathProgramCache]: Analyzing trace with hash -610271007, now seen corresponding path program 1 times [2023-04-01 05:38:19,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:19,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767706785] [2023-04-01 05:38:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:19,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:38:20,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:20,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767706785] [2023-04-01 05:38:20,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767706785] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:20,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:20,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:38:20,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990919041] [2023-04-01 05:38:20,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:20,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:38:20,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:20,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:38:20,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:38:20,361 INFO L87 Difference]: Start difference. First operand 436 states and 643 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 05:38:22,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:22,133 INFO L93 Difference]: Finished difference Result 1235 states and 1866 transitions. [2023-04-01 05:38:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 05:38:22,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 113 [2023-04-01 05:38:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:22,159 INFO L225 Difference]: With dead ends: 1235 [2023-04-01 05:38:22,160 INFO L226 Difference]: Without dead ends: 841 [2023-04-01 05:38:22,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:38:22,170 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 1208 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 3638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:22,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1295 Valid, 505 Invalid, 3638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 05:38:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2023-04-01 05:38:22,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 816. [2023-04-01 05:38:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 525 states have (on average 1.5371428571428571) internal successors, (807), 558 states have internal predecessors, (807), 212 states have call successors, (212), 81 states have call predecessors, (212), 78 states have return successors, (210), 200 states have call predecessors, (210), 204 states have call successors, (210) [2023-04-01 05:38:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1229 transitions. [2023-04-01 05:38:22,310 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1229 transitions. Word has length 113 [2023-04-01 05:38:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:22,311 INFO L495 AbstractCegarLoop]: Abstraction has 816 states and 1229 transitions. [2023-04-01 05:38:22,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 05:38:22,311 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1229 transitions. [2023-04-01 05:38:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-01 05:38:22,316 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:22,316 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:22,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:38:22,317 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:22,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:22,317 INFO L85 PathProgramCache]: Analyzing trace with hash 986587475, now seen corresponding path program 1 times [2023-04-01 05:38:22,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:22,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757249388] [2023-04-01 05:38:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:22,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:38:22,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:22,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757249388] [2023-04-01 05:38:22,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757249388] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:22,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:22,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 05:38:22,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004561817] [2023-04-01 05:38:22,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:22,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:38:22,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:22,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:38:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:38:22,803 INFO L87 Difference]: Start difference. First operand 816 states and 1229 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 05:38:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:23,301 INFO L93 Difference]: Finished difference Result 855 states and 1285 transitions. [2023-04-01 05:38:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:38:23,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 117 [2023-04-01 05:38:23,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:23,308 INFO L225 Difference]: With dead ends: 855 [2023-04-01 05:38:23,308 INFO L226 Difference]: Without dead ends: 838 [2023-04-01 05:38:23,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:38:23,313 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 660 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 1954 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:23,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 1954 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 05:38:23,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2023-04-01 05:38:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 820. [2023-04-01 05:38:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 529 states have (on average 1.5330812854442344) internal successors, (811), 562 states have internal predecessors, (811), 212 states have call successors, (212), 81 states have call predecessors, (212), 78 states have return successors, (210), 200 states have call predecessors, (210), 204 states have call successors, (210) [2023-04-01 05:38:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1233 transitions. [2023-04-01 05:38:23,370 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1233 transitions. Word has length 117 [2023-04-01 05:38:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:23,373 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 1233 transitions. [2023-04-01 05:38:23,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 05:38:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1233 transitions. [2023-04-01 05:38:23,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-01 05:38:23,377 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:23,377 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:23,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:38:23,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:23,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:23,378 INFO L85 PathProgramCache]: Analyzing trace with hash 627983244, now seen corresponding path program 1 times [2023-04-01 05:38:23,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:23,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895985508] [2023-04-01 05:38:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:23,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:38:23,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:23,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895985508] [2023-04-01 05:38:23,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895985508] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:23,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:23,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 05:38:23,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495161631] [2023-04-01 05:38:23,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:23,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:38:23,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:23,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:38:23,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:38:23,739 INFO L87 Difference]: Start difference. First operand 820 states and 1233 transitions. Second operand has 8 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-01 05:38:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:23,931 INFO L93 Difference]: Finished difference Result 841 states and 1259 transitions. [2023-04-01 05:38:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:38:23,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) Word has length 122 [2023-04-01 05:38:23,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:23,936 INFO L225 Difference]: With dead ends: 841 [2023-04-01 05:38:23,936 INFO L226 Difference]: Without dead ends: 824 [2023-04-01 05:38:23,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:38:23,940 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 10 mSDsluCounter, 3599 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4202 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:23,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4202 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2023-04-01 05:38:23,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 820. [2023-04-01 05:38:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 529 states have (on average 1.5293005671077504) internal successors, (809), 562 states have internal predecessors, (809), 212 states have call successors, (212), 81 states have call predecessors, (212), 78 states have return successors, (210), 200 states have call predecessors, (210), 204 states have call successors, (210) [2023-04-01 05:38:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1231 transitions. [2023-04-01 05:38:23,979 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1231 transitions. Word has length 122 [2023-04-01 05:38:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:23,979 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 1231 transitions. [2023-04-01 05:38:23,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-04-01 05:38:23,979 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1231 transitions. [2023-04-01 05:38:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 05:38:23,982 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:23,982 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:23,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 05:38:23,983 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:23,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash 806463546, now seen corresponding path program 1 times [2023-04-01 05:38:23,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:23,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17996825] [2023-04-01 05:38:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:23,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:38:24,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:24,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17996825] [2023-04-01 05:38:24,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17996825] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:24,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:24,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:38:24,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928391469] [2023-04-01 05:38:24,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:24,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:38:24,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:24,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:38:24,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:24,113 INFO L87 Difference]: Start difference. First operand 820 states and 1231 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:24,261 INFO L93 Difference]: Finished difference Result 2332 states and 3571 transitions. [2023-04-01 05:38:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:38:24,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 137 [2023-04-01 05:38:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:24,269 INFO L225 Difference]: With dead ends: 2332 [2023-04-01 05:38:24,269 INFO L226 Difference]: Without dead ends: 1554 [2023-04-01 05:38:24,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:38:24,272 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 590 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:24,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 1225 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:24,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2023-04-01 05:38:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1522. [2023-04-01 05:38:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1009 states have (on average 1.5490584737363726) internal successors, (1563), 1071 states have internal predecessors, (1563), 374 states have call successors, (374), 139 states have call predecessors, (374), 138 states have return successors, (390), 347 states have call predecessors, (390), 365 states have call successors, (390) [2023-04-01 05:38:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2327 transitions. [2023-04-01 05:38:24,346 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2327 transitions. Word has length 137 [2023-04-01 05:38:24,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:24,347 INFO L495 AbstractCegarLoop]: Abstraction has 1522 states and 2327 transitions. [2023-04-01 05:38:24,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2327 transitions. [2023-04-01 05:38:24,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-01 05:38:24,349 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:24,349 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:24,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 05:38:24,349 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:24,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:24,350 INFO L85 PathProgramCache]: Analyzing trace with hash -770733576, now seen corresponding path program 1 times [2023-04-01 05:38:24,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:24,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077402814] [2023-04-01 05:38:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:24,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:38:24,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:24,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077402814] [2023-04-01 05:38:24,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077402814] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:24,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:24,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:38:24,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807381970] [2023-04-01 05:38:24,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:24,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:38:24,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:38:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:24,452 INFO L87 Difference]: Start difference. First operand 1522 states and 2327 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:24,690 INFO L93 Difference]: Finished difference Result 4437 states and 6894 transitions. [2023-04-01 05:38:24,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:38:24,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 138 [2023-04-01 05:38:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:24,705 INFO L225 Difference]: With dead ends: 4437 [2023-04-01 05:38:24,706 INFO L226 Difference]: Without dead ends: 2960 [2023-04-01 05:38:24,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:38:24,710 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 589 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:24,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 1232 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2023-04-01 05:38:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2927. [2023-04-01 05:38:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 1970 states have (on average 1.5588832487309645) internal successors, (3071), 2090 states have internal predecessors, (3071), 698 states have call successors, (698), 255 states have call predecessors, (698), 258 states have return successors, (772), 641 states have call predecessors, (772), 687 states have call successors, (772) [2023-04-01 05:38:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 4541 transitions. [2023-04-01 05:38:24,830 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 4541 transitions. Word has length 138 [2023-04-01 05:38:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:24,831 INFO L495 AbstractCegarLoop]: Abstraction has 2927 states and 4541 transitions. [2023-04-01 05:38:24,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 4541 transitions. [2023-04-01 05:38:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-01 05:38:24,833 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:24,833 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:24,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 05:38:24,833 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:24,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1875767100, now seen corresponding path program 1 times [2023-04-01 05:38:24,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:24,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293240393] [2023-04-01 05:38:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:24,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:38:24,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:24,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293240393] [2023-04-01 05:38:24,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293240393] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:24,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:24,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:38:24,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978604597] [2023-04-01 05:38:24,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:24,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:38:24,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:24,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:38:24,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:24,927 INFO L87 Difference]: Start difference. First operand 2927 states and 4541 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:25,275 INFO L93 Difference]: Finished difference Result 8648 states and 13651 transitions. [2023-04-01 05:38:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:38:25,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 139 [2023-04-01 05:38:25,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:25,304 INFO L225 Difference]: With dead ends: 8648 [2023-04-01 05:38:25,304 INFO L226 Difference]: Without dead ends: 5772 [2023-04-01 05:38:25,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:38:25,315 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 588 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:25,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1238 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2023-04-01 05:38:25,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 5738. [2023-04-01 05:38:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5738 states, 3893 states have (on average 1.5630619059851014) internal successors, (6085), 4129 states have internal predecessors, (6085), 1346 states have call successors, (1346), 487 states have call predecessors, (1346), 498 states have return successors, (1614), 1229 states have call predecessors, (1614), 1331 states have call successors, (1614) [2023-04-01 05:38:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5738 states to 5738 states and 9045 transitions. [2023-04-01 05:38:25,692 INFO L78 Accepts]: Start accepts. Automaton has 5738 states and 9045 transitions. Word has length 139 [2023-04-01 05:38:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:25,692 INFO L495 AbstractCegarLoop]: Abstraction has 5738 states and 9045 transitions. [2023-04-01 05:38:25,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:25,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5738 states and 9045 transitions. [2023-04-01 05:38:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-01 05:38:25,698 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:25,698 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:25,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 05:38:25,699 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:25,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:25,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1982053958, now seen corresponding path program 1 times [2023-04-01 05:38:25,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:25,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573319990] [2023-04-01 05:38:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:25,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:38:25,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:25,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573319990] [2023-04-01 05:38:25,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573319990] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:25,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:25,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:38:25,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272185771] [2023-04-01 05:38:25,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:25,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:38:25,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:25,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:38:25,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:25,812 INFO L87 Difference]: Start difference. First operand 5738 states and 9045 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:26,328 INFO L93 Difference]: Finished difference Result 17071 states and 27558 transitions. [2023-04-01 05:38:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:38:26,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 140 [2023-04-01 05:38:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:26,403 INFO L225 Difference]: With dead ends: 17071 [2023-04-01 05:38:26,403 INFO L226 Difference]: Without dead ends: 11396 [2023-04-01 05:38:26,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:38:26,431 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 587 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:26,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1244 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:26,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11396 states. [2023-04-01 05:38:27,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11396 to 11361. [2023-04-01 05:38:27,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11361 states, 7740 states have (on average 1.5642118863049095) internal successors, (12107), 8208 states have internal predecessors, (12107), 2642 states have call successors, (2642), 951 states have call predecessors, (2642), 978 states have return successors, (3580), 2405 states have call predecessors, (3580), 2619 states have call successors, (3580) [2023-04-01 05:38:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11361 states to 11361 states and 18329 transitions. [2023-04-01 05:38:27,088 INFO L78 Accepts]: Start accepts. Automaton has 11361 states and 18329 transitions. Word has length 140 [2023-04-01 05:38:27,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:27,088 INFO L495 AbstractCegarLoop]: Abstraction has 11361 states and 18329 transitions. [2023-04-01 05:38:27,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 11361 states and 18329 transitions. [2023-04-01 05:38:27,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-01 05:38:27,091 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:27,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:27,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 05:38:27,092 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:27,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:27,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1315418562, now seen corresponding path program 1 times [2023-04-01 05:38:27,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:27,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044917386] [2023-04-01 05:38:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:27,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 05:38:27,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:27,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044917386] [2023-04-01 05:38:27,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044917386] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:27,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:38:27,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:38:27,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13719588] [2023-04-01 05:38:27,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:27,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:38:27,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:27,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:38:27,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:38:27,189 INFO L87 Difference]: Start difference. First operand 11361 states and 18329 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:27,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:27,713 INFO L93 Difference]: Finished difference Result 12100 states and 19604 transitions. [2023-04-01 05:38:27,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:38:27,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 141 [2023-04-01 05:38:27,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:27,779 INFO L225 Difference]: With dead ends: 12100 [2023-04-01 05:38:27,779 INFO L226 Difference]: Without dead ends: 12087 [2023-04-01 05:38:27,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:38:27,790 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 573 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:27,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 1242 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:27,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12087 states. [2023-04-01 05:38:28,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12087 to 12053. [2023-04-01 05:38:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12053 states, 8213 states have (on average 1.5638621697309143) internal successors, (12844), 8710 states have internal predecessors, (12844), 2803 states have call successors, (2803), 1008 states have call predecessors, (2803), 1036 states have return successors, (3893), 2550 states have call predecessors, (3893), 2780 states have call successors, (3893) [2023-04-01 05:38:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12053 states to 12053 states and 19540 transitions. [2023-04-01 05:38:28,470 INFO L78 Accepts]: Start accepts. Automaton has 12053 states and 19540 transitions. Word has length 141 [2023-04-01 05:38:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:28,472 INFO L495 AbstractCegarLoop]: Abstraction has 12053 states and 19540 transitions. [2023-04-01 05:38:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-04-01 05:38:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 12053 states and 19540 transitions. [2023-04-01 05:38:28,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-04-01 05:38:28,478 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:28,479 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:28,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 05:38:28,479 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:28,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash 518079372, now seen corresponding path program 1 times [2023-04-01 05:38:28,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:28,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138362495] [2023-04-01 05:38:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:28,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-04-01 05:38:28,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:28,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138362495] [2023-04-01 05:38:28,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138362495] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:28,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662603161] [2023-04-01 05:38:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:28,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:28,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:28,763 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 05:38:28,811 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 05:38:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:29,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 3958 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:38:29,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-04-01 05:38:29,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:29,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662603161] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:29,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:29,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-01 05:38:29,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422555416] [2023-04-01 05:38:29,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:29,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:38:29,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:29,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:38:29,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:38:29,463 INFO L87 Difference]: Start difference. First operand 12053 states and 19540 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2023-04-01 05:38:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:30,128 INFO L93 Difference]: Finished difference Result 25389 states and 42332 transitions. [2023-04-01 05:38:30,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:38:30,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 310 [2023-04-01 05:38:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:30,177 INFO L225 Difference]: With dead ends: 25389 [2023-04-01 05:38:30,178 INFO L226 Difference]: Without dead ends: 13379 [2023-04-01 05:38:30,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:38:30,217 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 213 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:30,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1587 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:38:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13379 states. [2023-04-01 05:38:30,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13379 to 13379. [2023-04-01 05:38:30,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13379 states, 9505 states have (on average 1.612414518674382) internal successors, (15326), 10002 states have internal predecessors, (15326), 2803 states have call successors, (2803), 1042 states have call predecessors, (2803), 1070 states have return successors, (3893), 2550 states have call predecessors, (3893), 2780 states have call successors, (3893) [2023-04-01 05:38:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13379 states to 13379 states and 22022 transitions. [2023-04-01 05:38:30,934 INFO L78 Accepts]: Start accepts. Automaton has 13379 states and 22022 transitions. Word has length 310 [2023-04-01 05:38:30,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:30,935 INFO L495 AbstractCegarLoop]: Abstraction has 13379 states and 22022 transitions. [2023-04-01 05:38:30,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2023-04-01 05:38:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand 13379 states and 22022 transitions. [2023-04-01 05:38:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2023-04-01 05:38:30,942 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:30,942 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:30,959 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 05:38:31,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 05:38:31,156 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:31,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:31,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1427196384, now seen corresponding path program 1 times [2023-04-01 05:38:31,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:31,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763258263] [2023-04-01 05:38:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:31,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2023-04-01 05:38:31,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:31,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763258263] [2023-04-01 05:38:31,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763258263] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:31,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445637164] [2023-04-01 05:38:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:31,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:31,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:31,550 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 05:38:31,554 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 05:38:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:32,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 3968 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:38:32,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2023-04-01 05:38:32,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:32,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445637164] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:32,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:32,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-01 05:38:32,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740104243] [2023-04-01 05:38:32,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:32,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:38:32,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:32,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:38:32,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:38:32,510 INFO L87 Difference]: Start difference. First operand 13379 states and 22022 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2023-04-01 05:38:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:33,326 INFO L93 Difference]: Finished difference Result 28041 states and 47262 transitions. [2023-04-01 05:38:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:38:33,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 320 [2023-04-01 05:38:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:33,384 INFO L225 Difference]: With dead ends: 28041 [2023-04-01 05:38:33,384 INFO L226 Difference]: Without dead ends: 14705 [2023-04-01 05:38:33,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:38:33,414 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 211 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:33,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1587 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:38:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14705 states. [2023-04-01 05:38:33,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14705 to 14705. [2023-04-01 05:38:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14705 states, 10797 states have (on average 1.649347040844679) internal successors, (17808), 11294 states have internal predecessors, (17808), 2803 states have call successors, (2803), 1076 states have call predecessors, (2803), 1104 states have return successors, (3893), 2550 states have call predecessors, (3893), 2780 states have call successors, (3893) [2023-04-01 05:38:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14705 states to 14705 states and 24504 transitions. [2023-04-01 05:38:33,934 INFO L78 Accepts]: Start accepts. Automaton has 14705 states and 24504 transitions. Word has length 320 [2023-04-01 05:38:33,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:33,934 INFO L495 AbstractCegarLoop]: Abstraction has 14705 states and 24504 transitions. [2023-04-01 05:38:33,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2023-04-01 05:38:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 14705 states and 24504 transitions. [2023-04-01 05:38:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2023-04-01 05:38:33,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:33,943 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 8, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:33,968 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 05:38:34,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 05:38:34,156 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:34,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:34,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1850346710, now seen corresponding path program 1 times [2023-04-01 05:38:34,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:34,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414880392] [2023-04-01 05:38:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:34,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2023-04-01 05:38:34,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:34,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414880392] [2023-04-01 05:38:34,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414880392] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:34,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643938794] [2023-04-01 05:38:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:34,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:34,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:34,624 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:38:34,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:38:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:35,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 3986 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 05:38:35,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-04-01 05:38:35,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:35,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643938794] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:35,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:35,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 05:38:35,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846876167] [2023-04-01 05:38:35,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:35,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:38:35,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:38:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:38:35,247 INFO L87 Difference]: Start difference. First operand 14705 states and 24504 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (44), 2 states have call predecessors, (44), 1 states have call successors, (44) [2023-04-01 05:38:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:35,732 INFO L93 Difference]: Finished difference Result 29484 states and 49393 transitions. [2023-04-01 05:38:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:38:35,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (44), 2 states have call predecessors, (44), 1 states have call successors, (44) Word has length 334 [2023-04-01 05:38:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:35,797 INFO L225 Difference]: With dead ends: 29484 [2023-04-01 05:38:35,797 INFO L226 Difference]: Without dead ends: 14848 [2023-04-01 05:38:35,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:38:35,822 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 10 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:35,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1195 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:38:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14848 states. [2023-04-01 05:38:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14848 to 14848. [2023-04-01 05:38:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14848 states, 10910 states have (on average 1.6466544454628782) internal successors, (17965), 11444 states have internal predecessors, (17965), 2803 states have call successors, (2803), 1076 states have call predecessors, (2803), 1134 states have return successors, (3664), 2543 states have call predecessors, (3664), 2780 states have call successors, (3664) [2023-04-01 05:38:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14848 states to 14848 states and 24432 transitions. [2023-04-01 05:38:36,297 INFO L78 Accepts]: Start accepts. Automaton has 14848 states and 24432 transitions. Word has length 334 [2023-04-01 05:38:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:36,298 INFO L495 AbstractCegarLoop]: Abstraction has 14848 states and 24432 transitions. [2023-04-01 05:38:36,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (44), 2 states have call predecessors, (44), 1 states have call successors, (44) [2023-04-01 05:38:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 14848 states and 24432 transitions. [2023-04-01 05:38:36,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2023-04-01 05:38:36,304 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:36,304 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 8, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:36,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 05:38:36,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:36,515 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:36,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1499610912, now seen corresponding path program 1 times [2023-04-01 05:38:36,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:36,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928318900] [2023-04-01 05:38:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:36,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2023-04-01 05:38:36,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:36,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928318900] [2023-04-01 05:38:36,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928318900] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:36,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627352734] [2023-04-01 05:38:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:36,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:36,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:36,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:38:36,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 05:38:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:37,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 3976 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:38:37,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 253 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-04-01 05:38:37,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:37,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627352734] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:37,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:37,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-01 05:38:37,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350129652] [2023-04-01 05:38:37,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:37,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:38:37,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:37,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:38:37,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:38:37,389 INFO L87 Difference]: Start difference. First operand 14848 states and 24432 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 2 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2023-04-01 05:38:38,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:38,114 INFO L93 Difference]: Finished difference Result 30979 states and 51876 transitions. [2023-04-01 05:38:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:38:38,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 2 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 328 [2023-04-01 05:38:38,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:38,178 INFO L225 Difference]: With dead ends: 30979 [2023-04-01 05:38:38,178 INFO L226 Difference]: Without dead ends: 16174 [2023-04-01 05:38:38,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:38:38,213 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 209 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:38,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1587 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:38:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2023-04-01 05:38:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 16174. [2023-04-01 05:38:38,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16174 states, 12202 states have (on average 1.6757089001802983) internal successors, (20447), 12736 states have internal predecessors, (20447), 2803 states have call successors, (2803), 1110 states have call predecessors, (2803), 1168 states have return successors, (3664), 2543 states have call predecessors, (3664), 2780 states have call successors, (3664) [2023-04-01 05:38:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16174 states to 16174 states and 26914 transitions. [2023-04-01 05:38:38,926 INFO L78 Accepts]: Start accepts. Automaton has 16174 states and 26914 transitions. Word has length 328 [2023-04-01 05:38:38,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:38,927 INFO L495 AbstractCegarLoop]: Abstraction has 16174 states and 26914 transitions. [2023-04-01 05:38:38,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 2 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2023-04-01 05:38:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 16174 states and 26914 transitions. [2023-04-01 05:38:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2023-04-01 05:38:38,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:38,935 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:38,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 05:38:39,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:39,164 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:39,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:39,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1590195844, now seen corresponding path program 1 times [2023-04-01 05:38:39,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:39,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419279137] [2023-04-01 05:38:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:39,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2023-04-01 05:38:39,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:39,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419279137] [2023-04-01 05:38:39,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419279137] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:39,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914541473] [2023-04-01 05:38:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:39,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:39,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:39,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:38:39,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 05:38:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:40,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 3987 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 05:38:40,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-04-01 05:38:40,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:40,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914541473] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:40,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:40,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-01 05:38:40,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836765787] [2023-04-01 05:38:40,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:40,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:38:40,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:40,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:38:40,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:38:40,086 INFO L87 Difference]: Start difference. First operand 16174 states and 26914 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 2 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2023-04-01 05:38:40,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:40,625 INFO L93 Difference]: Finished difference Result 33631 states and 56806 transitions. [2023-04-01 05:38:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:38:40,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 2 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 337 [2023-04-01 05:38:40,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:40,674 INFO L225 Difference]: With dead ends: 33631 [2023-04-01 05:38:40,675 INFO L226 Difference]: Without dead ends: 17500 [2023-04-01 05:38:40,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:38:40,706 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 207 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:40,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1587 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:38:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17500 states. [2023-04-01 05:38:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17500 to 17500. [2023-04-01 05:38:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17500 states, 13494 states have (on average 1.6991996442863495) internal successors, (22929), 14028 states have internal predecessors, (22929), 2803 states have call successors, (2803), 1144 states have call predecessors, (2803), 1202 states have return successors, (3664), 2543 states have call predecessors, (3664), 2780 states have call successors, (3664) [2023-04-01 05:38:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17500 states to 17500 states and 29396 transitions. [2023-04-01 05:38:41,385 INFO L78 Accepts]: Start accepts. Automaton has 17500 states and 29396 transitions. Word has length 337 [2023-04-01 05:38:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:41,385 INFO L495 AbstractCegarLoop]: Abstraction has 17500 states and 29396 transitions. [2023-04-01 05:38:41,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 2 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2023-04-01 05:38:41,386 INFO L276 IsEmpty]: Start isEmpty. Operand 17500 states and 29396 transitions. [2023-04-01 05:38:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2023-04-01 05:38:41,397 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:41,397 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:41,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 05:38:41,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 05:38:41,608 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:41,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:41,609 INFO L85 PathProgramCache]: Analyzing trace with hash 388082912, now seen corresponding path program 1 times [2023-04-01 05:38:41,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:41,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34033318] [2023-04-01 05:38:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:41,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-04-01 05:38:41,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:41,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34033318] [2023-04-01 05:38:41,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34033318] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:41,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68428522] [2023-04-01 05:38:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:41,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:41,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:41,985 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:38:41,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 05:38:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:42,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 3979 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 05:38:42,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2023-04-01 05:38:42,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:42,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68428522] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:42,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:42,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2023-04-01 05:38:42,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327940013] [2023-04-01 05:38:42,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:42,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:38:42,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:42,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:38:42,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:38:42,772 INFO L87 Difference]: Start difference. First operand 17500 states and 29396 transitions. Second operand has 9 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 5 states have call successors, (48), 4 states have call predecessors, (48), 6 states have return successors, (46), 7 states have call predecessors, (46), 4 states have call successors, (46) [2023-04-01 05:38:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:45,930 INFO L93 Difference]: Finished difference Result 37044 states and 62602 transitions. [2023-04-01 05:38:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 05:38:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 5 states have call successors, (48), 4 states have call predecessors, (48), 6 states have return successors, (46), 7 states have call predecessors, (46), 4 states have call successors, (46) Word has length 341 [2023-04-01 05:38:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:46,004 INFO L225 Difference]: With dead ends: 37044 [2023-04-01 05:38:46,005 INFO L226 Difference]: Without dead ends: 19592 [2023-04-01 05:38:46,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:38:46,055 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 1408 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 6135 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 6620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 6135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:46,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1571 Valid, 755 Invalid, 6620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 6135 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 05:38:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19592 states. [2023-04-01 05:38:46,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19592 to 18922. [2023-04-01 05:38:46,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18922 states, 14417 states have (on average 1.6559617118679337) internal successors, (23874), 14981 states have internal predecessors, (23874), 3052 states have call successors, (3052), 1369 states have call predecessors, (3052), 1452 states have return successors, (4293), 2811 states have call predecessors, (4293), 3029 states have call successors, (4293) [2023-04-01 05:38:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18922 states to 18922 states and 31219 transitions. [2023-04-01 05:38:46,773 INFO L78 Accepts]: Start accepts. Automaton has 18922 states and 31219 transitions. Word has length 341 [2023-04-01 05:38:46,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:46,773 INFO L495 AbstractCegarLoop]: Abstraction has 18922 states and 31219 transitions. [2023-04-01 05:38:46,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 5 states have call successors, (48), 4 states have call predecessors, (48), 6 states have return successors, (46), 7 states have call predecessors, (46), 4 states have call successors, (46) [2023-04-01 05:38:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 18922 states and 31219 transitions. [2023-04-01 05:38:46,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-01 05:38:46,809 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:46,810 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:46,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 05:38:47,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 05:38:47,020 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:47,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:47,021 INFO L85 PathProgramCache]: Analyzing trace with hash -776686424, now seen corresponding path program 1 times [2023-04-01 05:38:47,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:47,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777459879] [2023-04-01 05:38:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:47,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-04-01 05:38:47,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:47,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777459879] [2023-04-01 05:38:47,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777459879] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:47,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616703084] [2023-04-01 05:38:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:47,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:47,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:47,409 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:38:47,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 05:38:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:47,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 3974 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 05:38:47,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-04-01 05:38:48,155 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:38:48,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616703084] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:38:48,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:38:48,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2023-04-01 05:38:48,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494884296] [2023-04-01 05:38:48,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:38:48,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:38:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:38:48,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:38:48,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:38:48,161 INFO L87 Difference]: Start difference. First operand 18922 states and 31219 transitions. Second operand has 6 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 3 states have call successors, (59), 3 states have call predecessors, (59), 4 states have return successors, (55), 4 states have call predecessors, (55), 2 states have call successors, (55) [2023-04-01 05:38:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:38:49,432 INFO L93 Difference]: Finished difference Result 40827 states and 67117 transitions. [2023-04-01 05:38:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:38:49,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 3 states have call successors, (59), 3 states have call predecessors, (59), 4 states have return successors, (55), 4 states have call predecessors, (55), 2 states have call successors, (55) Word has length 338 [2023-04-01 05:38:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:38:49,516 INFO L225 Difference]: With dead ends: 40827 [2023-04-01 05:38:49,516 INFO L226 Difference]: Without dead ends: 21952 [2023-04-01 05:38:49,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:38:49,563 INFO L413 NwaCegarLoop]: 688 mSDtfsCounter, 345 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 2235 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 05:38:49,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 2235 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 05:38:49,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21952 states. [2023-04-01 05:38:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21952 to 21755. [2023-04-01 05:38:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21755 states, 16260 states have (on average 1.6145756457564575) internal successors, (26253), 16854 states have internal predecessors, (26253), 3652 states have call successors, (3652), 1755 states have call predecessors, (3652), 1842 states have return successors, (5590), 3385 states have call predecessors, (5590), 3629 states have call successors, (5590) [2023-04-01 05:38:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21755 states to 21755 states and 35495 transitions. [2023-04-01 05:38:50,490 INFO L78 Accepts]: Start accepts. Automaton has 21755 states and 35495 transitions. Word has length 338 [2023-04-01 05:38:50,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:38:50,491 INFO L495 AbstractCegarLoop]: Abstraction has 21755 states and 35495 transitions. [2023-04-01 05:38:50,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 3 states have call successors, (59), 3 states have call predecessors, (59), 4 states have return successors, (55), 4 states have call predecessors, (55), 2 states have call successors, (55) [2023-04-01 05:38:50,491 INFO L276 IsEmpty]: Start isEmpty. Operand 21755 states and 35495 transitions. [2023-04-01 05:38:50,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-04-01 05:38:50,498 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:38:50,499 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:38:50,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 05:38:50,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:50,711 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:38:50,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:38:50,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1881133839, now seen corresponding path program 1 times [2023-04-01 05:38:50,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:38:50,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798088721] [2023-04-01 05:38:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:50,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:38:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-04-01 05:38:50,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:38:50,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798088721] [2023-04-01 05:38:50,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798088721] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:38:50,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238679507] [2023-04-01 05:38:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:38:50,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:38:50,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:38:50,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:38:50,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 05:38:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:38:51,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 3978 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 05:38:51,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:38:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2023-04-01 05:38:52,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:38:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2023-04-01 05:38:52,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238679507] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:38:52,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787415391] [2023-04-01 05:38:52,770 INFO L159 IcfgInterpreter]: Started Sifa with 191 locations of interest [2023-04-01 05:38:52,770 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:38:52,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:38:52,777 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:38:52,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:38:55,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 187 for LOIs [2023-04-01 05:38:55,820 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 242 for LOIs [2023-04-01 05:38:58,642 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 242 for LOIs [2023-04-01 05:39:02,848 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 248063 conjuctions. This might take some time...